1. Center for Public Health Psychiatry Universitair Psychiatrisch Centrum KU Leuven Leuven Belgium
2. Survey Research Center, Institute for Social Research University of Michigan Ann Arbor Michigan USA
3. Department of Epidemiology and Psychosocial Research National Institute of Psychiatry Instituto Nacional de Psiquiatría Ramón de La Fuente Muñiz Mexico City Mexico
4. Department of Psychological Medicine University of Otago Dunedin New Zealand
5. Department of Health Care Policy Harvard Medical School Boston Massachusetts USA
6. Psychiatric and Neurodevelopmental Genetics Unit, Center for Genomic Medicine Massachusetts General Hospital Boston Massachusetts USA