1. Department of Medical Psychology and Medical Sociology; University of Leipzig; Germany
2. Department of Child and Adolescent Psychiatry, Psychotherapy and Psychosomatics; Otto-von-Guericke University; Magdeburg; Germany
3. Department of Child and Adolescent Psychiatry and Psychotherapy; Hamburg-Eppendorf University Medical Centre; Hamburg; Germany
4. Institute of Medical Psychology; Hamburg-Eppendorf University Medical Centre; Germany
5. Department of Psychosomatic and General Clinical Medicine; University Medical Centre Heidelberg; Germany
6. Department of Child and Adolescent Psychiatry, Psychosomatics and Psychotherapy; Charité University Medical Centre; Berlin; Germany
7. Department of Child and Adolescent Psychiatry, Psychotherapy and Psychosomatics; University Medical Centre Leipzig; Germany