Characteristics of COPD in never-smokers and ever-smokers in the general population: results from the CanCOLD study.
W C TanD D SinJ BourbeauP HernandezK R ChapmanR CowieJ Mark FitzGeraldD D MarciniukF MaltaisA S BuistJ RoadJ C HoggM KirbyH CoxsonC HagueJ LeipsicD E O'DonnellS D Aaronnull nullPublished in: Thorax (2015)
NCT00920348 (ClinicalTrials.gov); study ID number: IRO-93326.