1. Departamento de Gastroenterología, Escuela de Medicina, Pontificia Universidad Católica de Chile, Santiago, Chile
2. Department of Psychiatry, University of Michigan, Ann Arbor, Michigan, USA
3. Clinical Psychoneuroendocrinology and Neuropsychopharmacology Section, Translational Addiction Medicine Branch, National Institutes of Health, NIDA and NIAAA, Baltimore, Maryland, USA
4. Division of Gastroenterology, Hepatology, and Nutrition, Virginia Commonwealth University and Central Virginia Veterans Health Care System, Richmond, Virginia, USA
5. Liver Unit, Hospital Clinic, Institut d’Investigacions August Pi i Sunyer (IDIBAPS), Barcelona, Spain
6. Department of Medicine, Division of Gastroenterology, Schulich School of Medicine, Western University, London, Ontario, Canada