1. Department of Cardiology, Ulm University Heart Center, Albert-Einstein-Allee 23, 89081 Ulm, Germany
2. Department of Cardiology and Angiology, Bonifatius Hospital, Wilhelmstraße 13, 49808 Lingen, Germany
3. Department of Medicine I, Ulm University, Albert-Einstein-Allee 23, 89081 Ulm, Germany
4. Department of Cardiology, Angiology and Pneumology, Esslingen Hospital, Hirschlandstraße 97, 73730 Esslingen, Germany