[1] Univ Rome Sapienza, Rome, Italy
[2] Monaldi Hosp, Cardiol, Naples, Italy
[3] Univ Foggia, Foggia, Italy
[4] Ospedale San Francesco, Cardiol, Nuoro, Italy
[5] Univ Trieste, Clin Dept Med Surg & Hlth Sci, Trieste, Italy
[6] Ospedale San Michele Cagliari, Cagliari, Italy
[7] Ospedal Policlin Bari, Cardiol, Bari, Italy
[8] Azienda Ospedal Univ Policlin Bari, Bari, Italy
[9] Fdn Irccs Policlin San Matteo Pavia, Pavia, Italy
[10] Johns Hopkins Univ, Baltimore, MD 21218 USA
[11] Univ Catania, Ferrarotto Hosp, Catania, Italy
[12] Univ Milano Bicocca, Milan, Italy
[13] Azienda Sanit Univ Giuliano Isontina, Trieste, Italy
[14] Ist Mediterraneo Trapianti & Terapie Ad Alta Spec, Palermo, Italy
[15] Ospedale Generale Reg F Miulli, Acquaviva Delle Fonti, Italy