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surgery medicine urology surgical orthopedics trauma orthopedic surgery abdomen exposure radiation fluoroscopy carm xray procedure catheterization foley catheter nephrolithiasis urine stones science lasers damage control orthopedics traum shaft of femur femur shaft fracture femur fat embolism nutrients immunomodulation immune system nutrition injury liver kidney lobular carcinoma breast carcinoma cancer constipation pr enema per rectal stool enema feeding ryle's tube ng tube hernia abdominal wall anatomy gi tumors oncology gastrointestinal stromal tumors gist