1. Department of Psychology, Division of Clinical Psychology and Experimental Psychopathology, University of Groningen, Groningen, the Netherlands
2. Psychologische Hochschule Berlin, Berlin, Germany
3. Department of Psychology, Psychometrics and Statistics, University of Groningen, Groningen, the Netherlands
4. Department of Psychosomatic Medicine and Psychotherapy, University Medical Center Rostock, Rostock, Germany
5. Clinic for Rehabilitation Montafon, Schruns, Austria
6. Ludwig Boltzmann Institute – Rehabilitation Research, Vienna, Austria