1 Clinic III for Internal Medicine, University of Cologne, Faculty of Medicine and University Hospital Cologne, Kerpener Str. 61, 50937, Cologne, Germany.
2 Department of Cardiothoracic Surgery, University of Cologne, Faculty of Medicine and University Hospital Cologne, Kerpener Str. 61, 50937, Cologne, Germany.
3 Clinic III for Internal Medicine, University of Cologne, Faculty of Medicine and University Hospital Cologne, Kerpener Str. 61, 50937, Cologne, Germany. [email protected].