1 Department of Cardiology, Kepler University Hospital Linz, Medical Faculty, Johannes Kepler University, Linz, Austria, juergen.kammler@kepleruniklinikum.at.
2 Department of Cardiology, Kepler University Hospital Linz, Medical Faculty, Johannes Kepler University, Linz, Austria.
3 Paracelsus Medical University Salzburg, Salzburg, Austria.