[1] Sorlandet Hosp, Aust Agder Cty Outpatient Unit, Grp Therapy Team, Postboks 783, N-4809 Arendal, Norway
[2] Univ Oslo, Dept Psychol, Oslo, Norway
[3] Oslo Univ Hosp, Clin Mental Hlth & Addict, Dept Res & Dev, Oslo, Norway
[4] Univ Oslo, Inst Clin Med, Oslo, Norway
[5] Sorlandet Hosp, Aust Agder Cty Outpatient Unit, Arendal, Norway