1 Department of Cardiothoracic Surgery, University Hospital Muenster, Muenster, Germany.
2 Department of Cardiology III: Adult Congenital and Valvular Heart Disease, University Hospital Muenster, Muenster, Germany.
3 Department of Thoracic and Cardiovascular Surgery, Heart and Diabetes Center North Rhine-Westphalia, University Hospital Ruhr-University Bochum, Bad Oeynhausen, Germany.