1. Department of Medical Psychology and Medical Sociology; University of Leipzig; Leipzig Germany
2. Department of Psychosomatic Medicine and Psychotherapy; University Medical Center Mainz; Mainz Germany
3. Department of Child and Adolescent Psychiatry, Psychosomatics and Psychotherapy; University Hospital Münster; Münster Germany
4. Department of Child and Adolescent Psychiatry, Psychotherapy and Psychosomatics; University Medical Center Leipzig; Leipzig Germany