Intermittent positive pressure breathing: a continuing controversy.
D001991:Bronchitis / Q000175:diagnosis; D003365:Costs and Cost Analysis; D006801:Humans; D007384:Intermittent Positive-Pressure Breathing / Q000191:economics; D011175:Positive-Pressure Respiration / Q000191:economics; D011656:Pulmonary Emphysema / Q000175:diagnosis; D012119:Respiration