1. Department of Psychiatry, Sunderby Hospital, 97180 Luleå, Sweden
2. Sunderby Research Unit, Division of Psychiatry, Department of Clinical Sciences, Umeå University, Umeå, Sweden
3. Department of Public Health and Clinical Medicine, Medicine, Umeå University, Umeå, Sweden
4. Sunderby Research Unit, Department of Public Health and Clinical Medicine, Medicine, Umeå University, Umeå, Sweden