**Author details**

Stanislav Oravec *2nd Department of Internal Medicine, Faculty of Medicine, Comenius University, Bratislava, Slovak Republic*  Johannes Mikl *Department of Cardiology, Hietzing Hospital, Austria* 

Kristina Gruber *Department of Internal Medicine, Landesklinikum Thermenregion Baden, Austria* 

Elisabeth Dostal *Krankenanstalten Dr. Dostal, Vienna, Austria* 
