title: Quantitation of factors affecting the alveolar-arterial P O2  difference in thoracotomy.
mesh_terms: D000818:Animals; D004285:Dogs; D010100:Oxygen / Q000097:blood*; D011175:Positive-Pressure Respiration; D011650:Pulmonary Alveoli; D011652:Pulmonary Circulation; D012119:Respiration; D013903:Thoracic Surgery; D013909:Thorax / Q000601:surgery*
chemical_list: D010100:Oxygen