1. Department of Epidemiology; Biostatistics, and Occupational Health, Faculty of Medicine, McGill University, Montreal; Quebec Canada
2. Department of Psychology, Faculty of Science; McGill University Montreal; Quebec Canada
3. Department of Pediatrics, Faculty of Medicine; McGill University Montreal; Quebec Canada
4. Bristol Medical School: Population Health Sciences, Faculty of Health Sciences; University of Bristol; Bristol United Kingdom
5. Medical Research Council Integrative Epidemiology Unit; University of Bristol; Bristol United Kingdom
6. University Hospitals Bristol National Health Service Foundation Trust, National Institute for Health Research Bristol Biomedical Research Centre; University of Bristol; Bristol United Kingdom
7. Department of Population Medicine; Harvard Medical School and Harvard Pilgrim Health Care Institute; Boston Massachusetts
8. Harvard Pilgrim Health Care Institute; Boston Massachusetts