[1] ASST Grande Osped Metropolitano Niguarda, Piazza Osped Maggiore 3, I-20162 Milan, Italy
[2] Univ Milano Bicocca, Monza, Italy
[3] San Gerardo Hosp, ASST Monza, Monza, Italy
[4] Santa Maria Misericordia Hosp, Dept Cardiac Surg, Perugia, Italy
[5] Santa Maria Misericordia Hosp, Dept Anesthesia & Intens Care, Perugia, Italy
[6] Azienda Usl Toscana Sud Est, Med Perioperatoria Terapia Antalg, Interns Therapy Dept,Funct Area, Funct Area, Arezzo, Italy
[7] AO Ospedali Riuniti, Dept Cardiovasc Sci, Unit Cardiol Hemodynam Utic, Ancona, Italy
[8] San Donato Hosp, Arezzo, Italy
[9] Salvatore Maugeri Fdn, Sci Inst Telese, Clin Epidemiol Serv, Telese Terme, Benevento, Italy
[10] Azienda Osped Univ Pisana, Pisa, Italy