1. Department of Cardiology, San Paolo Hospital , Civitavecchia , Italy
2. Department of General and Specialized Surgery Paride Stefanini, Sapienza University of Rome , Rome , Italy
3. Department of Cardiac Surgery, San Bortolo—AULSS 8 Berica , Vicenza , Italy
4. Department of Medical Surgical Sciences and Biotechnologies, Sapienza University of Rome , Rome , Italy
5. Mediterranea Cardiocentro , Naples , Italy