1 Department of Cardiothoracic, Transplant and Vascular Surgery, Hanover Medical School, Carl - Neuberg Str.1, 30625, Hannover, Germany. kaufeld.tim@mh-hannover.de.
2 Department of Cardiothoracic, Transplant and Vascular Surgery, Hanover Medical School, Carl - Neuberg Str.1, 30625, Hannover, Germany.
3 Minneapolis Heart Institute, Abbott Northwester Hospital, 920E 28th St., Minneapolis, MN, 55417, USA.
4 Cardiovascular Medicine, Mayo Clinic, 200 First St. SW, Rochester, MN, 55905, USA.