[1] Univ Oslo, Inst Basic Med Sci, Dept Behav Med, Fac Med, Oslo, Norway
[2] Oslo Univ Hosp, Reg Sect Eating Disorders, Oslo, Norway
[3] Univ Oslo, Inst Clin Med, Div Mental Hlth & Addict, Oslo, Norway
[4] Inst Studies Med profess, Res Unit, Oslo, Norway
[5] Finnmark Hosp Trust, Sami Natl Competence Ctr Mental Hlth & Addict San, Karasjok, Norway
[6] Inst Psychotherapy, Hlth South East, Oslo, Norway