Angelo M Dell'Aquila1, Sabrina Lueck2, Bjoern Ellger3. 1. Department of Cardiothoracic Surgery, University Hospital Muenster, Albert-Schweitzer-Campus 1, Building A1, D-48149 Muenster, Germany. Electronic address: am.dellaquila@gmail.com. 2. Department of Cardiothoracic Surgery, University Hospital Muenster, Albert-Schweitzer-Campus 1, Building A1, D-48149 Muenster, Germany. 3. Department of Anesthesiology, Intensive Care Medicine, and Pain Therapy, University Hospital Muenster, Muenster, Germany.