Christiane Steinert1, Falk Leichsenring2. 1. Department of Psychosomatic Medicine and Psychotherapy, University of Giessen, 35392 Giessen, Germany. Electronic address: christiane.steinert@psycho.med.uni-giessen.de. 2. Department of Psychosomatic Medicine and Psychotherapy, University of Giessen, 35392 Giessen, Germany.