1 Centre for Clinical Epidemiology, Department of Epidemiology, Lady Davis Institute for Medical Research, Jewish General Hospital, McGill University, Montreal, QC, Canada.
2 Department of Epidemiology, Biostatistics and Occupational Health, McGill University, Montreal, QC, Canada.
3 Centre for Clinical Epidemiology, Department of Epidemiology, Lady Davis Institute for Medical Research, Jewish General Hospital, McGill University, Montreal, QC, Canada. brent.richards@mcgill.ca.
4 Department of Epidemiology, Biostatistics and Occupational Health, McGill University, Montreal, QC, Canada. brent.richards@mcgill.ca.
5 Centre for Clinical Epidemiology, Lady Davis Institute for Medical Research, Jewish General Hospital, 3755 Côte Ste-Catherine Road, Montreal, QC, H3T 1E2, Canada. brent.richards@mcgill.ca.
6 Department of Medicine, McGill University, Montreal, QC, Canada. brent.richards@mcgill.ca.
7 Department of Human Genetics, McGill University, Montreal, QC, Canada. brent.richards@mcgill.ca.
8 Department of Twin Research and Genetic Epidemiology, King's College London, London, UK. brent.richards@mcgill.ca.