1Department of Cardiology, University of Heidelberg, Heidelberg, Germany
2Department of Psychosomatic and General Internal Medicine, University of Heidelberg, Heidelberg, Germany
3Department of Cardiology, Theresienkrankenhaus Mannheim, Mannheim, Germany
4Institute of General Practice, Technische Universität München, München, Germany
5Department of Anaesthesiology and Pain Therapy, Inselspital, University of Bern, Bern, Switzerland
6University Hospital of Heidelberg, Im Neuenheimer Feld 410, Department of Cardiology, Heidelberg 69120, Germany