1. Department of Epidemiology, Emory University Rollins School of Public Health, Atlanta, Georgia, USA;
2. Ontario Institute for Studies in Education, University of Toronto, Toronto, Canada;
3. Department of Epidemiology, Biostatistics and Public Health Practice University of British Columbia School of Population and Public Health, Vancouver, Canada;
4. VA Greater Los Angeles Health Care System, Los Angeles, California, USA;
5. Department of Medical Psychology Amsterdam University Medical Centers, location VU, Amsterdam, Netherlands;
6. Department of Languages and Cultures, Ghent University, Ghent, Belgium;
7. Department of Family Medicine and Community Health University of Minnesota Medical School, Minneapolis, MN, USA