Fifty years of progress in respiratory care.
D049673:History, 20th Century; D006699:Home Care Services / Q000266:history; D006801:Humans; D010102:Oxygen Inhalation Therapy / Q000266:history / Q000295:instrumentation*; D012106:Research / Q000266:history; D012138:Respiratory Therapy / Q000266:history* / Q000295:instrumentation; D014481:United States