1. Parnassia Psychiatric Institute PsyQ, Department of Eating Disorders Rotterdam South Holland The Netherlands
2. Parnassia Psychiatric Institute The Hague South Holland The Netherlands
3. Institute of Psychology Erasmus University Rotterdam South Holland The Netherlands
4. Institute of Psychology Leiden University Leiden South Holland The Netherlands
5. Department of Bariatric Surgery Maasstad Hospital Rotterdam South Holland The Netherlands
6. Department of Bariatric Surgery Franciscus Hospital Rotterdam South Holland The Netherlands
7. University Medical Center Groningen, Department of Psychiatry University of Groningen Groningen The Netherlands
8. Mailman School of Public Health, Department of Epidemiology Columbia University New York New York USA