Comparison of three standardized questionnaires on respiratory symptoms.
D000328:Adult; D005260:Female; D005541:Forced Expiratory Volume; D006801:Humans; D008173:Lung Diseases, Obstructive / Q000175:diagnosis*; D008297:Male; D008875:Middle Aged; D012737:Sex Factors; D012907:Smoking; D013147:Spirometry; D011795:Surveys and Questionnaires; D013689:Telephone; D014797:Vital Capacity