What good is respiratory therapy?
D006801:Humans; D007384:Intermittent Positive-Pressure Breathing / Q000592:standards*; D008173:Lung Diseases, Obstructive / Q000628:therapy; D011175:Positive-Pressure Respiration / Q000592:standards*; D001261:Pulmonary Atelectasis / Q000628:therapy; D012140:Respiratory Tract Diseases / Q000628:therapy*; D014692:Ventilation-Perfusion Ratio