1. Department of Child and Adolescent Psychiatry, Psychotherapy and Psychosomatics, University of Leipzig, 04103 Leipzig, Germany
2. International Psychoanalytic University, 10555 Berlin, Germany
3. Institute of Social Medicine, Epidemiology and Health Economics, Charité—Universitätsmedizin Berlin, 10117 Berlin, Germany
4. Institute of Clinical Epidemiology and Biometry, University of Wuerzburg, 97080 Wuerzburg, Germany
5. State Institute of Health, Bavarian Health and Food Safety Authority, 97688 Bad Kissingen, Germany
6. University Hospital of Child and Adolescent Psychiatry and Psychotherapy, University of Bern, 3000 Bern, Switzerland