1. Department of Clinical Psychology and Psychotherapy, University of Trier, Trier, Germany
2. Department of Psychiatry and Psychotherapy, Lübeck University, Lübeck, Germany
3. Department of Clinical Psychology and Psychotherapy for Adults, Osnabrueck University, Osnabrueck, Germany
4. Department of Psychology, Bern University, Bern, Switzerland
5. GAIA Hamburg, Hamburg, Germany
6. Department of Psychiatry and Psychotherapy, University Medical Center Hamburg Eppendorf, Hamburg, Germany
7. Department of Psychology, MSH Medical School Hamburg, Institute of Clinical Psychology and Psychotherapy, Hamburg, Germany