1. Department of Internal Medicine II, Division of Cardiology, Paracelsus Medical University Salzburg, Salzburg, Austria
2. Department of Internal Medicine & Nephrology, VitaCenter, Zaporozhye, Ukraine
3. Department of Internal Medicine II, Division of Cardiology, Paracelsus Medical University, Salzburg, Austria
4. Alter Psychiatrie, Luzerner Psychiatrie AG, Lucerne, Switzerland