1 Study and Research Center Italian Society of Angiology and Vascular Pathology (SIAPAV), viale Gorizia 22, Milan 20144, Italy. Electronic address: claudio.cimminiello@gmail.com.
2 First Cardiology Department, National and Kapodistrian University of Athens, School of Medicine, Hippokration General Hospital of Athens, Greece. Electronic address: cvlachop@otenet.gr.
3 Cardiac Catheterization Laboratory, Cardiothoracic and Vascular Department, Pisa University Hospital, via Paradisa 2, Pisa 56124, Italy. Electronic address: marcodecarlo@gmail.com.