1. Department of Cardiovascular Surgery, University Hospital of Zurich, Zurich, Switzerland
2. Department of Cardiovascular Surgery, Nanjing Jinling Hospital, Nanjing, China
3. Cardiovascular Research Unit, Department of Surgery and Anesthesiology, University Hospital of Lausanne, Lausanne, Switzerland
4. Department of Cardiovascular Surgery, Cardiocentro Ticino Foundation, Lugano, Switzerland