1 Department of Cardiology, Vascular Medicine and Pneumology, GRN Hospital Weinheim, Germany.
2 Weinheim Cardiovascular Imaging Center, Hector Foundations, Weinheim, Germany.
3 Department of Cardiology and Vascular Medicine, West German Heart and Vascular Center, University of Duisburg-Essen, Germany.
4 Richard A. and Susan F. Smith Center for Outcomes Research in Cardiology, Department of Medicine, Beth Israel Deaconess Medical Center, Boston, Massachusetts, USA.
5 Harvard Medical School, Boston, Massachusetts, USA; Division of Cardiology, Department of Medicine, Beth Israel Deaconess Medical Center, Boston, Massachusetts, USA.