1. Department of Psychosomatic Medicine and Psychotherapy, Medical Center – University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany;
2. Department of Cardiovascular Surgery, Heart Center, Medical Center – University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany;
3. Department of Cardiology and Angiology II, University Heart Centre Freiburg – Bad Krozingen, Bad Krozingen, Germany;
4. German Heart Institute Berlin, Berlin, Germany