1. Department of Psychology, University of Oslo and Regional Department for Eating Disorders, Division of Mental Health and Addiction, Oslo University Hospital, Oslo, Norway
2. Regional Department for Eating Disorders, Division of Mental Health and Addiction, Oslo University Hospital, Oslo, Norway
3. Regional Department for Eating Disorders, Division of Mental Health and Addiction, Oslo University Hospital, Norway and Institute of Clinical Medicine, University of Oslo, Oslo, Norway
4. Department of Psychology, University of Oslo, Oslo, Norway