Hypoxemia and O2 therapy.
D006801:Humans; D000860:Hypoxia / Q000503:physiopathology / Q000628:therapy*; D008168:Lung / Q000503:physiopathology; D008173:Lung Diseases, Obstructive / Q000503:physiopathology / Q000628:therapy*; D010102:Oxygen Inhalation Therapy; D012119:Respiration