1. Centre for Clinical Epidemiology, Lady Davis Institute for Medical Research, Jewish General Hospital, Montréal, Québec, Canada2Department of Neurology and Neurosurgery, McGill University, Montréal, Québec, Canada3Department of Epidemiology and Biostatistics, McGill University, Montréal, Québec, Canada
2. Centre for Clinical Epidemiology, Lady Davis Institute for Medical Research, Jewish General Hospital, Montréal, Québec, Canada
3. Centre for Clinical Epidemiology, Lady Davis Institute for Medical Research, Jewish General Hospital, Montréal, Québec, Canada3Department of Epidemiology and Biostatistics, McGill University, Montréal, Québec, Canada