title: A 39-year-old smoker with effort dyspnea, normal spirometry results, and low diffusing capacity.
authors.affiliation: Department of Medicine, National University Hospital, Singapore.
authors.forename: N K
authors.initials: NK
authors.lastname: Chin
authors.forename: T K
authors.initials: TK
authors.lastname: Lim
mesh_terms: D000328:Adult; D003937:Diagnosis, Differential; D004417:Dyspnea / Q000175:diagnosis* / Q000209:etiology / Q000503:physiopathology; D006801:Humans; D008297:Male; D011653:Pulmonary Diffusing Capacity / Q000502:physiology; D011656:Pulmonary Emphysema / Q000175:diagnosis* / Q000209:etiology / Q000503:physiopathology; D012123:Pulmonary Ventilation / Q000502:physiology; D013902:Radiography, Thoracic; D012907:Smoking / Q000009:adverse effects*; D013147:Spirometry / Q000379:methods; D014057:Tomography, X-Ray Computed