title: Re: prevalence of chronic obstructive pulmonary disease among smokers attending primary healthcare clinics in Saudi Arabia.
authors.forename: Feisal A
authors.initials: FA
authors.lastname: Al-Kassimi
authors.forename: Esam H
authors.initials: EH
authors.lastname: Alhamad
mesh_terms: D005260:Female; D006801:Humans; D008297:Male; D008403:Mass Screening / Q000379:methods*; D029424:Pulmonary Disease, Chronic Obstructive / Q000453:epidemiology*; D012907:Smoking / Q000453:epidemiology*