1 Division of Cardiology, Cardiovascular and Thoracic Department, San Giovanni di Dio e Ruggi d' Aragona University Hospital, Largo Città d'Ippocrate, 84131 Salerno, Italy.
2 Vascular Physiopathology Unit, IRCCS Neuromed, Pozzilli, Italy.
3 Department of Medicine, Surgery and Dentistry, University of Salerno, Baronissi, Salerno, Italy.