[1] Stavanger Univ Hosp, Clin Adult Psychiat, Armauer Hansens vei 20, N-4011 Stavanger, Norway
[2] Univ Stavanger, Inst Hlth, Fac Social Sciences, Kjell Arholms gate 41, N-4036 Stavanger, Norway
[3] Stavanger Univ Hosp, Reg Centre Clin Res Psychosis, TIPS, Armauer Hansens vei 20, N-4011 Stavanger, Norway
[4] Haukeland Hosp, Dept Thorac Med, Jonas Lies vei 65, N-5021 Bergen, Norway
[5] Res Unit Gen Practice, Uni Res Hlth, Thormohlens Gate 55, N-5008 Bergen, Norway
[6] Stavanger Univ Hosp, Reg Centre Clin Res Psychosis, Clin Adult Psychiat, Armauer Hansens vei 20, N-4011 Stavanger, Norway
[7] Univ Oslo, Inst Clin Med, Natl Centre Suicide Res, Prevent, Sognsvannsveien 21, N-0372 Oslo, Oslo, Norway
[8] Yale Sch Med, Dept Psychiat, New Haven, CT USA
[9] Univ Bergen, Fac Med,Dept Clin Med,Sect Psychiat,Dent, Bergen, Norway