Current oxygen prescribing practices. Problems and prospects.
D000553:Ambulatory Care / Q000191:economics / Q000706:statistics & numerical data; D006699:Home Care Services / Q000191:economics / Q000706:statistics & numerical data; D006801:Humans; D008173:Lung Diseases, Obstructive / Q000097:blood / Q000628:therapy*; D006278:Medicare; D010100:Oxygen / Q000097:blood; D010102:Oxygen Inhalation Therapy / Q000191:economics* / Q000706:statistics & numerical data; D005082:Physical Exertion; D055656:Prescriptions / Q000191:economics; D014481:United States
D010100:Oxygen