1. Department of Community Medicine and Health, Alcohol Treatment Centre, Lausanne University Hospital CHUV, Lausanne, Switzerland;
2. Institute of Social and Preventive Medicine, and Epidemiology, Biostatistics and Preventive Institute, University of Zurich, Switzerland;
3. Centre for Addiction and Mental Health, Institute for Mental Health Policy Research, Toronto, ON, Canada;
4. Department of Health and Life Sciences, University of the West of England, Bristol, UK