Long term oxygen and advanced chronic bronchitis.
D001991:Bronchitis / Q000150:complications*; D002986:Clinical Trials as Topic; D006699:Home Care Services; D006801:Humans; D006976:Hypertension, Pulmonary / Q000150:complications; D000860:Hypoxia / Q000628:therapy*; D008134:Long-Term Care; D010102:Oxygen Inhalation Therapy / Q000639:trends*; D011086:Polycythemia / Q000150:complications; D011660:Pulmonary Heart Disease / Q000150:complications / Q000628:therapy*