1. Forensic Psychiatry, National Institute for Health and Welfare, P.O. Box 30, 00271 Helsinki, Finland
2. Psychiatric Hospital for Prisoners, P.O. Box 49, 20251 Turku, Finland
3. BioMag Laboratory, Helsinki University Central Hospital (HUCH), P.O. Box 340, 00029, Helsinki, Finland
4. Neuropsychiatric Outpatient Clinic and the Sleep Research Unit, Turku University Hospital, University of Turku, P.O. Box 52, 20521 Turku, Finland
5. Department of Clinical Neurophysiology, Helsinki University Central Hospital, P.O. Box 1020, 10601 Helsinki, Finland
6. Institute of Biomedical Engineering, Tampere University of Technology, 33101 Tampere, Finland