1. Department of Cardiac Surgery, Cardiocentro Ticino Institute, Lugano, Switzerland
2. Department of Cardiac Surgery, San Bortolo Hospital, Vicenza, Italy
3. Department of Cardiology, University of Padova, Padova, Italy
4. Department of Surgery, New York Presbyterian Hospital, Columbia University, New York, NY, USA
5. Department of Cardiac Surgery, Boston Children's Hospital, Harvard Medical School, Boston, MA, USA
6. Department of Cardiovascular Surgery, Labatt Family Heart Centre, The Hospital for Sick Children, University of Toronto, Toronto, ON, Canada
7. Postgraduate Program in Health Sciences: Cardiology and Cardiovascular Sciences, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
8. University of Zurich, Zurich, Switzerland