Positive Drugs Tests "Capped" At 12 During Los Angeles 1984, Says Former IAAF VPisteroidscom
A former International Association of Athletics Federations (IAAF) vice-president has alleged that the number of positive drugs tests at the Los Angeles Olympics in 1984 was "capped" at 12 despite a higher number of failures.
Athletes Caught For Doping Will Be Banned For Lifeisteroidscom
Distance-running great Haile Gebrselassie, who was elected head of the Ethiopian Athletics Federation (EAF), has remarked Ethiopia will impose lifetime bans on drug cheats.
China Faces Weightlifting Ban After Weightlifters Lose Doping Appealisteroidscom
The Court of Arbitration for Sport (CAS) has dismissed the appeals filed by Cao Lei (75kg) and Liu Chunhong (69kg) who were stripped of the gold medals they won at the 2008 Beijing Olympics after they failed doping tests conducted eight years later.
IOC Orders To Return Medals Defied By Russian Athletesisteroidscom
Russian three-time Olympic silver medalist Tatyana Firova has decided not to return her silver medals in defiance to orders issued by the International Olympic Committee.
WADA Exceeded Power While Compiling McLaren Report, Says FINA Presidentisteroidscom
The World Anti-Doping Agency (WADA) Independent Commission "exceeded their power" while compiling the explosive McLaren Report into Russian doping, according to International Swimming Federation (FINA) President Julio Maglione.
Positive Drugs Tests "Capped" At 12 During Los Angeles 1984, Says Former IAAF VPisteroidscom
A former International Association of Athletics Federations (IAAF) vice-president has alleged that the number of positive drugs tests at the Los Angeles Olympics in 1984 was "capped" at 12 despite a higher number of failures.
Athletes Caught For Doping Will Be Banned For Lifeisteroidscom
Distance-running great Haile Gebrselassie, who was elected head of the Ethiopian Athletics Federation (EAF), has remarked Ethiopia will impose lifetime bans on drug cheats.
China Faces Weightlifting Ban After Weightlifters Lose Doping Appealisteroidscom
The Court of Arbitration for Sport (CAS) has dismissed the appeals filed by Cao Lei (75kg) and Liu Chunhong (69kg) who were stripped of the gold medals they won at the 2008 Beijing Olympics after they failed doping tests conducted eight years later.
IOC Orders To Return Medals Defied By Russian Athletesisteroidscom
Russian three-time Olympic silver medalist Tatyana Firova has decided not to return her silver medals in defiance to orders issued by the International Olympic Committee.
WADA Exceeded Power While Compiling McLaren Report, Says FINA Presidentisteroidscom
The World Anti-Doping Agency (WADA) Independent Commission "exceeded their power" while compiling the explosive McLaren Report into Russian doping, according to International Swimming Federation (FINA) President Julio Maglione.
More Medalists Stripped For Doping At Beijing Olympicsisteroidscom
The International Olympic Committee has stripped four athletes, including three Russians, after their doping samples from 2008 were retested and came back positive for banned drugs.
Russia Never Engaged In State-Backed Doping, Says New Russian Anti-Doping Chiefisteroidscom
Vitaly Smirnov, member of the International Olympic Committee (IOC) and chief of Russia's newly-created doping watchdog, has rejected allegations of Russia having a doping program at the state level.
FLAU President Defends Anti-Doping Measuresisteroidscom
Ihor Hotsul, President of the Ukrainian Athletics Federation (FLAU), has come out strongly to justify improvements made by his organization to improve its anti-doping procedures.
Doping Cases Of Three Weightlifters To Be Probed By COCisteroidscom
The Chinese Olympic Committee (COC) reiterated its zero tolerance to doping and vowed to investigate the cases of three Chinese weightlifters after they were stripped of gold medals won during 2008 Olympic Games.
Global Doping Enforcement System Is Broken, Says USOC Presidentisteroidscom
U.S. Olympic Committee president Larry Probst has described the worldwide efforts against doping as broken. Probst cautioned against anti-doping efforts focusing on a single country or group of nations.
In the late 1990s, Sports Illustrated asked Olympic athletes a variation of the Goldman’s dilemma: If you were given a performance enhancing substance, and guaranteed that you would win and not be caught, would you take it?
Chinese Swimmers 'Warned' For Clenbuterol Useisteroidscom
A "warning penalty" will be issued to swimmers Wang Lizhuo and An Jiabao after both tested positive for the banned substance Clenbuterol, according to an announcement by the Chinese Swimming Association.
Eight More Russian Athletes Cleared By IAAF To Compete As Neutralsisteroidscom
The world governing body of athletics has approved eight Russians to compete as neutrals but has declined the applications of a further 53 competitors hoping to be awarded a similar status.
Doping Progress Hailed By Tour De France Chiefisteroidscom
Christian Prudhomme, the general director of the Tour de France since 2007, has remarked anti-doping measures in the recent past have significantly changed image of cycling. Prudhomme said he believes that doping in cycling is under control and that all the measures that have been taken should be enough.
The Athletics Federation of Russia has announced suspensions of four years have been imposed on Russian runners whose samples from the 2008 Beijing Olympics tested positive for a banned steroid.
Double Olympic Freestyle Wrestling Medalist Banned For Dopingisteroidscom
The United World Wrestling (UWW) has confirmed that double Olympic freestyle wrestling medalist Toghrul Asgarov is one of two athletes suspended by the international governing body of the sport over anti-doping violations.
Ex-Leigh And Wales Hooker Gets Doping Banisteroidscom
UK Anti-Doping (UKAD) has announced former Leigh and Wales hooker Sean Penkywicz has been banned for two years after he tested positive for a growth hormone releasing peptide.
Ben Rothwell Flagged By USADA For Potential Doping Violationisteroidscom
Ben Rothwell, the American mixed martial artist who competes as a Heavyweight in the Ultimate Fighting Championship, has been flagged by the United States Anti-Doping Agency.
More Medalists Stripped For Doping At Beijing Olympicsisteroidscom
The International Olympic Committee has stripped four athletes, including three Russians, after their doping samples from 2008 were retested and came back positive for banned drugs.
Russia Never Engaged In State-Backed Doping, Says New Russian Anti-Doping Chiefisteroidscom
Vitaly Smirnov, member of the International Olympic Committee (IOC) and chief of Russia's newly-created doping watchdog, has rejected allegations of Russia having a doping program at the state level.
FLAU President Defends Anti-Doping Measuresisteroidscom
Ihor Hotsul, President of the Ukrainian Athletics Federation (FLAU), has come out strongly to justify improvements made by his organization to improve its anti-doping procedures.
Doping Cases Of Three Weightlifters To Be Probed By COCisteroidscom
The Chinese Olympic Committee (COC) reiterated its zero tolerance to doping and vowed to investigate the cases of three Chinese weightlifters after they were stripped of gold medals won during 2008 Olympic Games.
Global Doping Enforcement System Is Broken, Says USOC Presidentisteroidscom
U.S. Olympic Committee president Larry Probst has described the worldwide efforts against doping as broken. Probst cautioned against anti-doping efforts focusing on a single country or group of nations.
In the late 1990s, Sports Illustrated asked Olympic athletes a variation of the Goldman’s dilemma: If you were given a performance enhancing substance, and guaranteed that you would win and not be caught, would you take it?
Chinese Swimmers 'Warned' For Clenbuterol Useisteroidscom
A "warning penalty" will be issued to swimmers Wang Lizhuo and An Jiabao after both tested positive for the banned substance Clenbuterol, according to an announcement by the Chinese Swimming Association.
Eight More Russian Athletes Cleared By IAAF To Compete As Neutralsisteroidscom
The world governing body of athletics has approved eight Russians to compete as neutrals but has declined the applications of a further 53 competitors hoping to be awarded a similar status.
Doping Progress Hailed By Tour De France Chiefisteroidscom
Christian Prudhomme, the general director of the Tour de France since 2007, has remarked anti-doping measures in the recent past have significantly changed image of cycling. Prudhomme said he believes that doping in cycling is under control and that all the measures that have been taken should be enough.
The Athletics Federation of Russia has announced suspensions of four years have been imposed on Russian runners whose samples from the 2008 Beijing Olympics tested positive for a banned steroid.
Double Olympic Freestyle Wrestling Medalist Banned For Dopingisteroidscom
The United World Wrestling (UWW) has confirmed that double Olympic freestyle wrestling medalist Toghrul Asgarov is one of two athletes suspended by the international governing body of the sport over anti-doping violations.
Ex-Leigh And Wales Hooker Gets Doping Banisteroidscom
UK Anti-Doping (UKAD) has announced former Leigh and Wales hooker Sean Penkywicz has been banned for two years after he tested positive for a growth hormone releasing peptide.
Ben Rothwell Flagged By USADA For Potential Doping Violationisteroidscom
Ben Rothwell, the American mixed martial artist who competes as a Heavyweight in the Ultimate Fighting Championship, has been flagged by the United States Anti-Doping Agency.
Acute scrotum is a general term referring to an emergency condition affecting the contents or the wall of the scrotum.
There are a number of conditions that present acutely, predominantly with pain and/or swelling
A careful and detailed history and examination, and in some cases, investigations allow differentiation between these diagnoses. A prompt diagnosis is essential as the patient may require urgent surgical intervention
Testicular torsion refers to twisting of the spermatic cord, causing ischaemia of the testicle.
Testicular torsion results from inadequate fixation of the testis to the tunica vaginalis producing ischemia from reduced arterial inflow and venous outflow obstruction.
The prevalence of testicular torsion in adult patients hospitalized with acute scrotal pain is approximately 25 to 50 percent
Pulmonary Thromboembolism - etilogy, types, medical- Surgical and nursing man...VarunMahajani
Disruption of blood supply to lung alveoli due to blockage of one or more pulmonary blood vessels is called as Pulmonary thromboembolism. In this presentation we will discuss its causes, types and its management in depth.
- Video recording of this lecture in English language: https://youtu.be/lK81BzxMqdo
- Video recording of this lecture in Arabic language: https://youtu.be/Ve4P0COk9OI
- Link to download the book free: https://nephrotube.blogspot.com/p/nephrotube-nephrology-books.html
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ARTIFICIAL INTELLIGENCE IN HEALTHCARE.pdfAnujkumaranit
Artificial intelligence (AI) refers to the simulation of human intelligence processes by machines, especially computer systems. It encompasses tasks such as learning, reasoning, problem-solving, perception, and language understanding. AI technologies are revolutionizing various fields, from healthcare to finance, by enabling machines to perform tasks that typically require human intelligence.
Lung Cancer: Artificial Intelligence, Synergetics, Complex System Analysis, S...Oleg Kshivets
RESULTS: Overall life span (LS) was 2252.1±1742.5 days and cumulative 5-year survival (5YS) reached 73.2%, 10 years – 64.8%, 20 years – 42.5%. 513 LCP lived more than 5 years (LS=3124.6±1525.6 days), 148 LCP – more than 10 years (LS=5054.4±1504.1 days).199 LCP died because of LC (LS=562.7±374.5 days). 5YS of LCP after bi/lobectomies was significantly superior in comparison with LCP after pneumonectomies (78.1% vs.63.7%, P=0.00001 by log-rank test). AT significantly improved 5YS (66.3% vs. 34.8%) (P=0.00000 by log-rank test) only for LCP with N1-2. Cox modeling displayed that 5YS of LCP significantly depended on: phase transition (PT) early-invasive LC in terms of synergetics, PT N0—N12, cell ratio factors (ratio between cancer cells- CC and blood cells subpopulations), G1-3, histology, glucose, AT, blood cell circuit, prothrombin index, heparin tolerance, recalcification time (P=0.000-0.038). Neural networks, genetic algorithm selection and bootstrap simulation revealed relationships between 5YS and PT early-invasive LC (rank=1), PT N0—N12 (rank=2), thrombocytes/CC (3), erythrocytes/CC (4), eosinophils/CC (5), healthy cells/CC (6), lymphocytes/CC (7), segmented neutrophils/CC (8), stick neutrophils/CC (9), monocytes/CC (10); leucocytes/CC (11). Correct prediction of 5YS was 100% by neural networks computing (area under ROC curve=1.0; error=0.0).
CONCLUSIONS: 5YS of LCP after radical procedures significantly depended on: 1) PT early-invasive cancer; 2) PT N0--N12; 3) cell ratio factors; 4) blood cell circuit; 5) biochemical factors; 6) hemostasis system; 7) AT; 8) LC characteristics; 9) LC cell dynamics; 10) surgery type: lobectomy/pneumonectomy; 11) anthropometric data. Optimal diagnosis and treatment strategies for LC are: 1) screening and early detection of LC; 2) availability of experienced thoracic surgeons because of complexity of radical procedures; 3) aggressive en block surgery and adequate lymph node dissection for completeness; 4) precise prediction; 5) adjuvant chemoimmunoradiotherapy for LCP with unfavorable prognosis.
Tom Selleck Health: A Comprehensive Look at the Iconic Actor’s Wellness Journeygreendigital
Tom Selleck, an enduring figure in Hollywood. has captivated audiences for decades with his rugged charm, iconic moustache. and memorable roles in television and film. From his breakout role as Thomas Magnum in Magnum P.I. to his current portrayal of Frank Reagan in Blue Bloods. Selleck's career has spanned over 50 years. But beyond his professional achievements. fans have often been curious about Tom Selleck Health. especially as he has aged in the public eye.
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Introduction
Many have been interested in Tom Selleck health. not only because of his enduring presence on screen but also because of the challenges. and lifestyle choices he has faced and made over the years. This article delves into the various aspects of Tom Selleck health. exploring his fitness regimen, diet, mental health. and the challenges he has encountered as he ages. We'll look at how he maintains his well-being. the health issues he has faced, and his approach to ageing .
Early Life and Career
Childhood and Athletic Beginnings
Tom Selleck was born on January 29, 1945, in Detroit, Michigan, and grew up in Sherman Oaks, California. From an early age, he was involved in sports, particularly basketball. which played a significant role in his physical development. His athletic pursuits continued into college. where he attended the University of Southern California (USC) on a basketball scholarship. This early involvement in sports laid a strong foundation for his physical health and disciplined lifestyle.
Transition to Acting
Selleck's transition from an athlete to an actor came with its physical demands. His first significant role in "Magnum P.I." required him to perform various stunts and maintain a fit appearance. This role, which he played from 1980 to 1988. necessitated a rigorous fitness routine to meet the show's demands. setting the stage for his long-term commitment to health and wellness.
Fitness Regimen
Workout Routine
Tom Selleck health and fitness regimen has evolved. adapting to his changing roles and age. During his "Magnum, P.I." days. Selleck's workouts were intense and focused on building and maintaining muscle mass. His routine included weightlifting, cardiovascular exercises. and specific training for the stunts he performed on the show.
Selleck adjusted his fitness routine as he aged to suit his body's needs. Today, his workouts focus on maintaining flexibility, strength, and cardiovascular health. He incorporates low-impact exercises such as swimming, walking, and light weightlifting. This balanced approach helps him stay fit without putting undue strain on his joints and muscles.
Importance of Flexibility and Mobility
In recent years, Selleck has emphasized the importance of flexibility and mobility in his fitness regimen. Understanding the natural decline in muscle mass and joint flexibility with age. he includes stretching and yoga in his routine. These practices help prevent injuries, improve posture, and maintain mobilit
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These simplified slides by Dr. Sidra Arshad present an overview of the non-respiratory functions of the respiratory tract.
Learning objectives:
1. Enlist the non-respiratory functions of the respiratory tract
2. Briefly explain how these functions are carried out
3. Discuss the significance of dead space
4. Differentiate between minute ventilation and alveolar ventilation
5. Describe the cough and sneeze reflexes
Study Resources:
1. Chapter 39, Guyton and Hall Textbook of Medical Physiology, 14th edition
2. Chapter 34, Ganong’s Review of Medical Physiology, 26th edition
3. Chapter 17, Human Physiology by Lauralee Sherwood, 9th edition
4. Non-respiratory functions of the lungs https://academic.oup.com/bjaed/article/13/3/98/278874
Title: Sense of Smell
Presenter: Dr. Faiza, Assistant Professor of Physiology
Qualifications:
MBBS (Best Graduate, AIMC Lahore)
FCPS Physiology
ICMT, CHPE, DHPE (STMU)
MPH (GC University, Faisalabad)
MBA (Virtual University of Pakistan)
Learning Objectives:
Describe the primary categories of smells and the concept of odor blindness.
Explain the structure and location of the olfactory membrane and mucosa, including the types and roles of cells involved in olfaction.
Describe the pathway and mechanisms of olfactory signal transmission from the olfactory receptors to the brain.
Illustrate the biochemical cascade triggered by odorant binding to olfactory receptors, including the role of G-proteins and second messengers in generating an action potential.
Identify different types of olfactory disorders such as anosmia, hyposmia, hyperosmia, and dysosmia, including their potential causes.
Key Topics:
Olfactory Genes:
3% of the human genome accounts for olfactory genes.
400 genes for odorant receptors.
Olfactory Membrane:
Located in the superior part of the nasal cavity.
Medially: Folds downward along the superior septum.
Laterally: Folds over the superior turbinate and upper surface of the middle turbinate.
Total surface area: 5-10 square centimeters.
Olfactory Mucosa:
Olfactory Cells: Bipolar nerve cells derived from the CNS (100 million), with 4-25 olfactory cilia per cell.
Sustentacular Cells: Produce mucus and maintain ionic and molecular environment.
Basal Cells: Replace worn-out olfactory cells with an average lifespan of 1-2 months.
Bowman’s Gland: Secretes mucus.
Stimulation of Olfactory Cells:
Odorant dissolves in mucus and attaches to receptors on olfactory cilia.
Involves a cascade effect through G-proteins and second messengers, leading to depolarization and action potential generation in the olfactory nerve.
Quality of a Good Odorant:
Small (3-20 Carbon atoms), volatile, water-soluble, and lipid-soluble.
Facilitated by odorant-binding proteins in mucus.
Membrane Potential and Action Potential:
Resting membrane potential: -55mV.
Action potential frequency in the olfactory nerve increases with odorant strength.
Adaptation Towards the Sense of Smell:
Rapid adaptation within the first second, with further slow adaptation.
Psychological adaptation greater than receptor adaptation, involving feedback inhibition from the central nervous system.
Primary Sensations of Smell:
Camphoraceous, Musky, Floral, Pepperminty, Ethereal, Pungent, Putrid.
Odor Detection Threshold:
Examples: Hydrogen sulfide (0.0005 ppm), Methyl-mercaptan (0.002 ppm).
Some toxic substances are odorless at lethal concentrations.
Characteristics of Smell:
Odor blindness for single substances due to lack of appropriate receptor protein.
Behavioral and emotional influences of smell.
Transmission of Olfactory Signals:
From olfactory cells to glomeruli in the olfactory bulb, involving lateral inhibition.
Primitive, less old, and new olfactory systems with different path
Flu Vaccine Alert in Bangalore Karnatakaaddon Scans
As flu season approaches, health officials in Bangalore, Karnataka, are urging residents to get their flu vaccinations. The seasonal flu, while common, can lead to severe health complications, particularly for vulnerable populations such as young children, the elderly, and those with underlying health conditions.
Dr. Vidisha Kumari, a leading epidemiologist in Bangalore, emphasizes the importance of getting vaccinated. "The flu vaccine is our best defense against the influenza virus. It not only protects individuals but also helps prevent the spread of the virus in our communities," he says.
This year, the flu season is expected to coincide with a potential increase in other respiratory illnesses. The Karnataka Health Department has launched an awareness campaign highlighting the significance of flu vaccinations. They have set up multiple vaccination centers across Bangalore, making it convenient for residents to receive their shots.
To encourage widespread vaccination, the government is also collaborating with local schools, workplaces, and community centers to facilitate vaccination drives. Special attention is being given to ensuring that the vaccine is accessible to all, including marginalized communities who may have limited access to healthcare.
Residents are reminded that the flu vaccine is safe and effective. Common side effects are mild and may include soreness at the injection site, mild fever, or muscle aches. These side effects are generally short-lived and far less severe than the flu itself.
Healthcare providers are also stressing the importance of continuing COVID-19 precautions. Wearing masks, practicing good hand hygiene, and maintaining social distancing are still crucial, especially in crowded places.
Protect yourself and your loved ones by getting vaccinated. Together, we can help keep Bangalore healthy and safe this flu season. For more information on vaccination centers and schedules, residents can visit the Karnataka Health Department’s official website or follow their social media pages.
Stay informed, stay safe, and get your flu shot today!
New Drug Discovery and Development .....NEHA GUPTA
The "New Drug Discovery and Development" process involves the identification, design, testing, and manufacturing of novel pharmaceutical compounds with the aim of introducing new and improved treatments for various medical conditions. This comprehensive endeavor encompasses various stages, including target identification, preclinical studies, clinical trials, regulatory approval, and post-market surveillance. It involves multidisciplinary collaboration among scientists, researchers, clinicians, regulatory experts, and pharmaceutical companies to bring innovative therapies to market and address unmet medical needs.
Evaluation of antidepressant activity of clitoris ternatea in animals
Timeline
1. Timeline of Performance Enhancing Drugs<br />By,<br />Karlee Ferris<br />1889 French physician Charles-Édouard Brown-Séquard, claims to feel younger form extracting testicular fluid from dogs and guinea pigs and injecting it into himself and announces it at a scientific meeting in Paris.1904 St. Louis Olympics marathon winner Thomas Hicks (USA) is given strychnine and brandy during the race.<br />1890<br />1900<br />1910<br />1920<br />1930<br />1935 German scientists, develop anabolic steroids as a way to treat hypogonadism -- testosterone deficiency.<br />19401940-1945 Nazis test anabolic steroids on prisoners, Gestapos and Hitler himself. Testosterone is used on soldiers to create aggression.<br />1945-1947 To help reverse wasting effect of WWII and concentration camp imprisonment anabolic steroids are used.<br />1950<br />1954 The U.S.S.R. begins to dominate the sport of power lifting, a Soviet team doctor allegedly tells of his team's use of testosterone injections to U.S. weightlifting doctor.<br />1958 Anabolic steroid -- methandrostenolone -- is released by Ciba Pharmaceuticals under the name Dianabol.<br />1960<br />1960 Danish cyclist Knud Enemark Jensen crashes during the road race at the Rome Olympics after taking a stimulant. He dies from a fractured skull.<br />1960 Sports Illustrated publishes an article revealing the use of amphetamines (quot;
pep pillsquot;
), tranquilizers, cocaine and other drugs in elite sports.<br />1967 A British cyclist’s death from amphetamines spurs the Tour de France to institute doping controls.<br />1969 Sports Illustrated makes an investigation about performance-enhancing drugs in sports. Sources predict that the use of such drugs will eventually explode into an epidemic.<br />1970<br />1972 The International Olympic Committee begins full-scale drug testing at the Olympics<br />1976 The International Olympic Committee adds anabolic steroids to its banned list.<br />1976 The Olympic athletes are tested for the first time for anabolic steroids at the Montreal Olympics.<br />19801983 The gene for human erythropoietin (EPO) is cloned.<br />1983 The governing body of the Pan Am Games in Caracas strips 2medals from athletes for testing positive for anabolic steroids.<br />1985 HGH, a synthetic human growth hormone, is produced.<br />1988 Sprinter Ben Johnson tests positive for an anabolic steroid after winning the 100 meters in a world-record time. He is stripped of his medal, banned for two years and had is time deleted for testing positive.<br />19901990 The National Football League institutes a year-round, random steroid testing program.<br />1990 The Anabolic Steroids Control Act is introduced by Congress. It classifies steroids as a schedule III controlled substance, for which trafficking is now a felony.<br />1991 Twenty former East German coaches admit to administering anabolic steroids to some of their swimmers.<br />1993 The Association of Tennis Professionals, the Women's Tennis Association and the International Tennis Federation create an anti-doping program.<br />1998 Vials of EPO are discovered in a French Festina team car at the Tour de France. Several riders and team support crew are charged with doping. They were suspended.<br />1998 St. Louis Cardinals slugger Mark McGwire admits using androstenedione.<br />1999 The NBA adds steroids to its list of banned substances<br />1999 The World Anti-Doping Agency (WADA), an independent agency, is formed through the IOC.<br />20002000 Urinalysis tests are improved to detect EPO, but blood doping undetectable. EPO testing is implemented in Sydney Olympics<br />2000 The U.S. Anti-Doping Agency (USADA) begins operations<br />2002 MLB does not have a testing for steroids but if more than 5% of results from the anonymous tests are positive they will start formal testing and penalties the following year<br />2003-2004 Government agents raid the Bay Area Laboratory Cooperative (BALCO). And several athletes get subpoenaed for testing.<br />2003 The International Olympic Committee adds THG to its list of banned substances.<br />2004 MLB begins mandatory steroid testing for players.<br />2004 A record 24 athletes are ousted for drug-related violations at the Athens Olympics.<br />2005 MLB cracks down on drug testing and Major leaguers — including Canseco, Rafael Palmeiro, Mark McGwire and Sammy Sosa — testify before a congressional committee investigating steroid use.<br />2005 The NHL establishes a drug-testing policy for performance-enhancing substances.<br />2006 Tour de France winner, U.S. cyclist Floyd Landis tests positive for an illegal testosterone ratio.<br />2007 The NFL and its players union announced changes to toughen its steroid policy<br />2007 International Olympic Committee strips 5 medals from athlete for testing positive.<br />