Marco Spartera1, Ottavio Alfieri2, Giovanni La Canna2. 1. Cardio-Thoracic-Vascular Department, San Raffaele Scientific Institute, via Olgettina 60, 20132, Milan, Italy. marco.spartera@gmail.com. 2. Cardio-Thoracic-Vascular Department, San Raffaele Scientific Institute, via Olgettina 60, 20132, Milan, Italy.