[1] Yale Univ, Sch Med, Dept Psychiat, New Haven, CT USA
[2] Oslo Univ Hosp, Div Mental Hlth & Addict, Reg Dept Eating Disorders, Oslo, Norway
[3] Univ Oslo, Fac Social Sci, Dept Psychol, Oslo, Norway
[4] Neuropsychiat Res Inst, Fargo, ND USA
[5] Univ N Dakota, Sch Med & Hlth Sci, Dept Clin Neurosci, Fargo, ND USA