1. Institute of Medical Biostatistics, Epidemiology and Informatics, University Medical Centre; Johannes Gutenberg University Mainz; Mainz Germany
2. University Cancer Centre Mainz; Mainz Germany
3. Psychotherapy Practice; Bonn Germany
4. Psychotherapy Practice; Osnabrück Germany
5. Psychotherapy Practice; Wangen im Allgäu Germany
6. Psychotherapy Practice; Freiburg im Breisgau Germany