1. Department for the Treatment and Study of Cardiothoracic Diseases and Cardiothoracic Transplantation; IRCCS - Istituto Mediterraneo per i Trapianti e Terapie ad Alta Specializzazione; Palermo Italy
2. Cardiovascular Department; Papa Giovanni XXIII Hospital; Bergamo Italy
3. University of Milano ‘Bicocca’; Milan Italy
4. Division of Cardiovascular Diseases; Mayo Clinic and Foundation; Rochester MN USA
5. Department of Cardiothoracic and Vascular Surgery; Deutsches Herzzentrum; Berlin Germany