1. MRC/CSO Social and Public Health Sciences Unit, University of Glasgow, Glasgow, Scotland
2. Public Health Research Group, School of Health & Wellbeing, University of Glasgow, Glasgow, Scotland
3. Center for Genetic Epidemiology and Mental Health, Norwegian Institute of Public Health, Oslo, Norway
4. Nic Waals Institute, Lovisenberg Diaconal Hospital, Oslo, Norway
5. Department of Psychology, Promenta Research Center, University of Oslo, Oslo, Norway
6. Department of Food Safety, Norwegian Institute of Public Health, Oslo, Norway