1. Psychosomatikum, Kiel, Germany
2. Child and Adolescent Psychiatric Clinic, Helios Klinikum Schleswig, Schleswig, Germany
3. VAMED Rehaklinik, Damp, Germany
4. Institute for Medical Psychology and Sociology, University of Kiel, Kiel, Germany
5. Child and Adolescent Psychiatric Clinic, Psychiatrische Kliniken, Lüneburg, Germany
6. Child and Adolescent Psychiatric Clinic, Vorwerker Diakonie, Lübeck, Germany
7. University Clinic for Child and Adolescent Psychiatry, Bielefeld, Germany