[1] Oxford Univ Hosp NHS Trust, Oxford, England
[2] Univ Hosp Bern, Inselspital, Bern, Switzerland
[3] IRCCS Policlin San Matteo, Genoa, Italy
[4] ASST Melegnano Martesana, Milan, Italy
[5] Maria Cecilia Hosp, Cotignola, Ravenna, Italy
[6] Humanitas Clin & Res Ctr, Milan, Italy
[7] Columbus Hosp, Milan, Italy
[8] Montefiore Med Ctr, Scarsdale, NY USA
[9] Medstar Heart Inst, Washington, DC USA
[10] Humanitas Res Hosp, Milan, Italy