1 Cardiothoracic Center, Sant'Ambrogio Clinical Institute, Gruppo Ospedaliero San Donato, University and Research Hospitals, Milan, Italy.
2 Cardiothoracic Center, Sant'Ambrogio Clinical Institute, Gruppo Ospedaliero San Donato, University and Research Hospitals, Milan, Italy; Department of Clinical Science at South Bristol, University of Bristol, Bristol, United Kingdom. Electronic address: antoniomiceli79@alice.it.