Affiliation: | 1. Division of Pharmacoepidemiology and Pharmacoeconomics, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts, USA;2. ICES in Ontario, Toronto, Ontario, Canada;3. St Michael's Hospital, Department of Medicine, University of Toronto, Toronto, Ontario, Canada Li Ka Shing Knowledge Institute, St Michael's Hospital, Toronto, Ontario, Canada;4. ICES in Ontario, Toronto, Ontario, Canada Li Ka Shing Knowledge Institute, St Michael's Hospital, Toronto, Ontario, Canada |