[1] Stavanger Univ Hosp, TIPS, Ctr Clin Psychosis Res, N-4008 Stavanger, Norway
[2] Rogaland A Senter, Dept Res & Dev, N-4028 Stavanger, Norway
[3] Molde Univ Coll, POB 2110, N-6402 Molde, Norway
[4] Oslo Univ Hosp, Div Mental Hlth & Addict, POB 4959, N-0424 Oslo, Norway
[5] Univ Stavanger, Fac Social Sci, Network Med Sci, N-4036 Stavanger, Norway
[6] Univ Oslo, Dept Psychol, PO 1094 Blindern, N-0317 Oslo, Norway
[7] Univ Oslo, Inst Clin Med, POB 1171, N-0318 Oslo, Norway
[8] Univ Bergen, Dept Clin Med, Jonas Lies vei 65, N-5021 Bergen, Norway
[9] Vestre Viken Hosp Trust, N-3004 Drammen, Norway
[10] Psychiat Res Unit, Faelledvej 6, DK-4200 Slagelse, Denmark
[11] Univ Copenhagen, POB 2177, Copenhagen, Denmark
[12] Univ Oslo, Dept Behav Sci Med, PO 1130 Blindern, N-0318 Oslo, Norway
[13] Yale Univ, Sch Med, Yale Psychiat Res Congress Pl, Dept Psychiat, 301 Cedar St, New Haven, CT 06519 USA