1. Department of Surgery and Anesthesiology, CHUV, Lausanne, Switzerland
2. Department of Musculoskeletal Medicine, CHUV, Lausanne, Switzerland
3. Division of Cardiac Surgery, University Hospital of Basel, Basel, Switzerland
4. Cardiocentro Ticino, Lugano, Switzerland
5. Department of Cardiovascular Surgery, University Hospital of Zurich, Zurich, Switzerland