aDepartment of Cardiovascular Surgery, University Hospital Schleswig-Holstein, Campus Kiel

bInstitute of Medical Informatics and Statistics, Kiel University, University Hospital Schleswig-Holstein

cDepartment of Internal Medicine III/Cardiology, University Hospital Schleswig-Holstein, Campus Kiel, Kiel, Germany and DZHK, partner site Hamburg, Kiel, Lübeck

dMedizinische Klinik I, St. Johannes Hospital Dortmund, Dortmund, Germany

Correspondence to Christina Grothusen, MD, Department of Cardiovascular Surgery, University Hospital Schleswig-Holstein, Campus Kiel, Arnold-Heller Str. 3, Haus C, 24105 Kiel, Germany. Tel: +49 431 500 22002; e-mail: [email protected]

Received 6 July, 2021

Revised 24 March, 2022

Accepted 29 May, 2022