1. Department of Psychotherapy and Psychosomatic Medicine, University hospital C. G. Carus, Technische Universität Dresden, Dresden, Germany;
2. Department of Neurology, University hospital C. G. Carus, Technische Universität Dresden, Dresden, Germany;
3. Department for Psychosomatic Medicine and Psychotherapy, University Medical Center of the Johannes Gutenberg University, Mainz, Germany;
4. Department of Medical Psychology and Medical Sociology, University of Leipzig, Leipzig, Germany