1 Clinic of Internal Medicine II, Department of Cardiology, Paracelsus Medical University, Salzburg, Austria.
2 Division of Cardiology, Department of Medicine, Karolinska Institutet, Karolinska University Hospital, Stockholm, Sweden.
3 Division of Cardiology, Pulmonary Diseases and Vascular Medicine, Department of Medicine, Düsseldorf University Hospital, Düsseldorf, Germany - christian.jung@med.uni-duesseldorf.de.