1. Department of Public Health Solutions, Alcohol, Drugs and Addictions Unit; National Institute for Health and Welfare; Helsinki Finland
2. Institute of Clinical Medicine; University and University Hospital of Helsinki; Helsinki Finland
3. Faculty of Social Sciences, Department of Psychology and Speech-Language Pathology; University of Turku; Turku Finland
4. Department of Public Health Solutions, Health Monitoring Unit; National Institute for Health and Welfare; Helsinki Finland
5. Abdominal Center; University of Helsinki; Helsinki Finland