title: He and SF6 single-breath expiration curves. Comparison with the paiva-engel model.
mesh_terms: D000328:Adult; D005459:Fluorides; D006371:Helium; D006801:Humans; D008297:Male; D008875:Middle Aged; D008954:Models, Biological; D012123:Pulmonary Ventilation; D012119:Respiration; D012126:Respiratory Dead Space; D012129:Respiratory Function Tests; D013459:Sulfur Hexafluoride
chemical_list: D006371:Helium; D005459:Fluorides; D013459:Sulfur Hexafluoride