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