1 Centre de Recherche du CHUM, 900 R. Saint-Denis, Montréal, Quebec H2X 0A9, Canada.
2 Clinical Epidemiology Program, Ottawa Hospital Research Institute, 1053 Carling Ave, Ottawa, Ontario K1Y 4E9, Canada.
3 Clinical Epidemiology Program, Ottawa Hospital Research Institute, 1053 Carling Ave, Ottawa, Ontario K1Y 4E9, Canada; Department of Anesthesiology and Pain Medicine, University of Ottawa, 75 Laurier Ave E, Ottawa, Ontario K1N 6N5, Canada.
4 Department of Equity, Ethics and Policy, McGill University, 2001 McGill College, Montréal, Quebec H3A 1G1, Canada. Electronic address: jonathan.kimmelman@mcgill.ca.