1. Department of Child and Adolescent Psychiatry, University Medical Center Hamburg-Eppendorf, 20251 Hamburg, Germany
2. Institute for Medical Biometry and Epidemiology, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany
3. Department of Psychiatry and Psychotherapy II, Ulm University, 89081 Ulm, Germany
4. Department of Child and Adolescent Psychiatry, Psychosomatic Medicine and Psychotherapy, Charité University Medicine Berlin, 13353 Berlin, Germany
5. Department of Psychiatry and Psychotherapy, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany