[1] Cent Hosp Halmstad, Dept Psychiat, SE-30185 Halmstad, Sweden
[2] Sahlgrens Univ Hosp, Dept Psychiat & Neurochem, Inst Clin Neursoci, Molndal, Sweden
[3] Univ Gothenburg, Coll Hlth Sci, Dept Nursing, Gothenburg, Sweden
[4] Huddinge Univ Hosp, Karolinska Inst, Div Psychiat, S-14186 Huddinge, Sweden