1. Medical Clinic, Division of Psychosomatic Medicine, Charité Universitätsmedizin, Campus Benjamin Franklin, 12203 Berlin, Germany
2. German Center for Cardiovascular Research, Partner Site Berlin, 10785 Berlin, Germany
3. Psychosomatics, Medical Heart Center of Charite and German Heart Institute Berlin, Institute of Cardiothoracic and Vascular Surgery, 13353 Berlin, Germany
4. Department of Clinical Neuroscience, Karolinska Institute, 171 77 Stockholm, Sweden
5. Department of Psychosomatic Medicine and Psychotherapy, University of Göttingen Medical Center, 37075 Gottingen, Germany
6. German Center for Cardiovascular Research, Partner Site Göttingen, 37075 Göttingen, Germany