Long-term oxygen for hypoxemia.
D002908:Chronic Disease / Q000628:therapy; D006801:Humans; D000860:Hypoxia / Q000628:therapy*; D010102:Oxygen Inhalation Therapy; D011086:Polycythemia / Q000628:therapy; D011660:Pulmonary Heart Disease / Q000628:therapy; D012131:Respiratory Insufficiency / Q000628:therapy*