1 Department of Internal Medicine III, Cardiology and Angiology, University Hospital Schleswig-Holstein, Kiel D-24105, Germany; DZHK (German Centre for Cardiovascular Research), Partner Site Hamburg/ Kiel/ Lübeck, Germany.
2 Department of Internal Medicine III, Cardiology and Angiology, University Hospital Schleswig-Holstein, Kiel D-24105, Germany; DZHK (German Centre for Cardiovascular Research), Partner Site Hamburg/ Kiel/ Lübeck, Germany. Electronic address: derk.frank@uksh.de.