1. Division of Gastroenterology and Hepatology, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
2. Translational Addiction Research Laboratory, Campbell Family Mental Health Research Institute, Centre for Addiction and Mental Health, Toronto, Ontario, Canada
3. Acute Care Program, Centre for Addiction and Mental Health, Toronto, Ontario, Canada
4. Departments of Family and Community Medicine, Pharmacology and Toxicology, Psychiatry, Institute of Medical Science, University of Toronto, Toronto, Ontario, Canada
5. Campbell Family Mental Health Research Institute, Centre for Addiction and Mental Health, Toronto, Ontario, Canada
6. Institute for Mental Health Policy Research, Centre for Addiction and Mental Health, Toronto, Ontario, Canada
7. Department of Gastroenterology and Hepatology, McMaster University, Hamilton, Ontario, Canada
8. Department of Medicine, University of Munich and Center of Endoscopy, Starnberg, Germany