1. Regional Department for Eating Disorders, Division of Mental Health and Addiction; Oslo University Hospital, P.O. Box 4956 Nydalen; Oslo 0424 Norway
2. Division of Mental Health and Addiction; Institute of Clinical Medicine, University of Oslo, P.O. Box 1171 Blindern; Oslo 0318 Norway
3. Institute of Psychology, University of Oslo, P.O. Box 1094 Blindern; Oslo 0317 Norway