1 School of Epidemiology, Public Health & Preventive Medicine (Khan), University of Ottawa; Clinical Epidemiology Program (Khan, Le Gal, Rodger), Ottawa Hospital Research Institute; Ottawa Blood Disease Centre, Department of Medicine (Le Gal, Rodger), University of Ottawa and The Ottawa Hospital, Ottawa, Ont.
2 School of Epidemiology, Public Health & Preventive Medicine (Khan), University of Ottawa; Clinical Epidemiology Program (Khan, Le Gal, Rodger), Ottawa Hospital Research Institute; Ottawa Blood Disease Centre, Department of Medicine (Le Gal, Rodger), University of Ottawa and The Ottawa Hospital, Ottawa, Ont. mrodger@ohri.ca.