1 Cardiac Surgery Unit, San Gerardo Hospital, and Department of Medicine and Surgery, University of Milano-Bicocca, Monza, Italy. Electronic address: [email protected].
2 Department of Critical Care Medicine and Surgery, Division of Cardiac Surgery, Mazankowski Alberta Heart Institute, University of Alberta, Edmonton, Alberta, Canada.
3 Cardiac Surgery Unit, San Gerardo Hospital, and Department of Medicine and Surgery, University of Milano-Bicocca, Monza, Italy.