Alveolar-arterial N 2  gradients at rest and during exercise in healthy men of different ages.
D000328:Adult; D000367:Age Factors; D000368:Aged; D006801:Humans; D008297:Male; D008875:Middle Aged; D009584:Nitrogen / Q000097:blood; D010100:Oxygen / Q000097:blood; D005082:Physical Exertion; D011650:Pulmonary Alveoli; D011652:Pulmonary Circulation; D011653:Pulmonary Diffusing Capacity; D014692:Ventilation-Perfusion Ratio
D009584:Nitrogen; D010100:Oxygen