title: Number needed to treat: enigmatic results for exacerbations in COPD.
authors.affiliation: Centre for Clinical Epidemiology, Lady Davis Institute - Jewish General Hospital, and Dept of Epidemiology and Biostatistics, McGill University, Montreal, QC, Canada samy.suissa@mcgill.ca.
authors.forename: Samy
authors.initials: S
authors.lastname: Suissa
mesh_terms: D018450:Disease Progression; D006801:Humans; D029424:Pulmonary Disease, Chronic Obstructive