title: Estimating prevalence of chronic obstructive pulmonary disease: from questionnaires to spirometry.
authors.forename: S K
authors.initials: SK
authors.lastname: Chhabra
authors.forename: Pragti
authors.initials: P
authors.lastname: Chhabra
mesh_terms: D006801:Humans; D007194:India / Q000453:epidemiology; D015995:Prevalence; D029424:Pulmonary Disease, Chronic Obstructive / Q000175:diagnosis* / Q000453:epidemiology; D013147:Spirometry; D011795:Surveys and Questionnaires