1. From the Cardiology Department (T.W., M.R., E.M., B.E.), Klinikum Wels-Grieskirchen, Wels, Austria; Paracelsus Medical University (T.W.), Salzburg, Austria; Health and Environment Department (S.W., B.H., C.C.M., J.K.), Austrian Institute of Technology, Vienna, Austria; Institute of Analysis and Scientific Computing (S.W., J.K.), Vienna University of Technology, Vienna, Austria.