1. Department of Anesthesiology; Georg-August-University; Goettingen Germany
2. Department of Cardiology and Pneumology; Georg-August-University; Goettingen Germany
3. Department of Cardiothoracic Surgery; Heart and Diabetes Center NRW; Bad Oeynhausen Germany
4. Department of Thoracic and Cardiovascular Surgery; Georg-August-University; Goettingen Germany
5. DZHK (German Center for Cardiovascular Research) partnersite Göttingen; Germany