[1] Natl Inst Hlth & Welf, Alcohol Drugs & Addict Unit, Helsinki, Finland
[2] Univ Helsinki, Inst Clin Med, Helsinki, Finland
[3] Univ Turku, Dept Psychol & Speech Language Pathol, Fac Social Sci, Turku, Finland
[4] Natl Inst Hlth & Welf, Hlth Monitoring Unit, Helsinki, Finland
[5] Univ Helsinki, Abdominal Ctr, Helsinki, Finland
[6] Univ Helsinki Hosp, Helsinki, Finland