[1] Stavanger Univ Hosp, Div Psychiat, Reg Ctr Clin Res Psychosis, N-4068 Stavanger, Norway
[2] Early Psychosis Intervent Ctr, DK-4000 Roskilde, Denmark
[3] Univ Bergen, Fac Psychol, N-5020 Bergen, Norway
[4] Univ Stavanger, Fac Sci & Math, N-4036 Stavanger, Norway
[5] Oslo Univ Hosp, Div Mental Hlth & Addict, N-4087 Oslo, Norway
[6] Univ Oslo, Fac Med, Inst Psychiat, N-0318 Oslo, Norway
[7] Univ Stavanger, Fac Social Sci, N-4036 Stavanger, Norway
[8] Univ Oslo, Dept Psychol, N-0318 Oslo, Norway
[9] Vestre Viken Hosp Trust, N-3004 Drammen, Norway
[10] Roskilde Univ, Psychiat Res Unit, DK-4000 Roskilde, Denmark
[11] Univ Copenhagen, DK-4000 Roskilde, Denmark
[12] Univ Oslo, Dept Behav Sci Med, N-0318 Oslo, Norway
[13] Yale Univ, Dept Psychiat, New Haven, CT 06520 USA