title: The burden of undiagnosed airflow obstruction in India.
authors.forename: Z F
authors.initials: ZF
authors.lastname: Udwadia
mesh_terms: D005541:Forced Expiratory Volume; D006801:Humans; D015994:Incidence; D007194:India / Q000453:epidemiology; D029424:Pulmonary Disease, Chronic Obstructive / Q000175:diagnosis* / Q000453:epidemiology; D012307:Risk Factors; D014797:Vital Capacity