1 Department Psychosomatic Medicine and Psychotherapy, Medical University Clinic Tuebingen, Medical University Hospital Tuebingen, Osianderstr. 5, 72076 Tuebingen, Germany.
2 Department Psychosomatic Medicine and Psychotherapy, Medical University Clinic Tuebingen, Medical University Hospital Tuebingen, Osianderstr. 5, 72076 Tuebingen, Germany ; German College of Psychosomatic Medicine and Psychotherapy, Tuebingen, Germany.