aDepartment of Medicine and Surgery, University of Milano-Bicocca

bDepartment of Cardio-Thoracic-Vascular Diseases, Foundation IRCCS Cà Granda Ospedale Maggiore Policlinico, Milan, Italy

cDepartment of Cardiology, University Hospital ‘Dr Dragisa Misovic-Dedinje’, Belgrade, Serbia

Correspondence to Professor Cesare Cuspidi, University of Milano-Bicocca Meda, Milan, 20821, Italy. E-mail: [email protected]