title: Early diagnosis of chronic obstructive pulmonary disease.
mesh_terms: D001985:Bronchial Provocation Tests; D006801:Humans; D008173:Lung Diseases, Obstructive / Q000175:diagnosis*; D008176:Lung Volume Measurements; D008487:Medical History Taking; D012123:Pulmonary Ventilation; D012129:Respiratory Function Tests; D013147:Spirometry / Q000379:methods; D013997:Time Factors