1 Department of Cardio Thoracic and Vascular Diseases, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy. Electronic address: amsettembrini@gmail.com.
2 Department of Cardio Thoracic and Vascular Diseases, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy.
3 Department of Cardio Thoracic and Vascular Diseases, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy; Department of Clinical and Community Sciences, Università degli Studi di Milano, Milan, Italy.