Hydrogen oxygen ventilator (ams-h-03) H₂ 66.6% / O₂ 33.3% Proven Effective Against COVID-19 Hydrogen-Oxygen Mixed Gas Reduces Airway Resistance Breathing Hydrogen-Oxygen Mixed gas Decreases Inspiratory Effort in Patients with Tracheal Stenosis Hydrogen-Oxygen Mixed Gas Reduces Cytokine Storm Hydrogen-Oxygen Mixed Gas Against Sepsis Hydrogen-Oxygen Mixed Gas on European Respiratory Journal