1. Department of Psychiatry and Psychotherapy; University Medical Center Hamburg-Eppendorf; Hamburg Germany
2. Center for Interdisciplinary Addiction Research; University of Hamburg; Germany
3. Department of Radiotherapy; University Medical Center Hamburg-Eppendorf; Germany
4. Department and Outpatient Clinic of Medical Psychology; University Medical Center Hamburg-Eppendorf; Germany
5. Department of Medical Psychology and Medical Sociology; University Medical Center Leipzig; Germany