[1] Univ Padua, Dept Med, I-35100 Padua, Italy
[2] Baker IDI Heart & Diabet Inst, Melbourne, Vic, Australia
[3] San Bortolo Hosp, Dept Surg, Vicenza, Italy
[4] East Carolina Univ, Brody Sch Med, Greenville, NC USA
[5] Brigham & Womens Hosp, Ctr Metab & Bariatr Surg, Boston, MA 02115 USA
[6] San Giovanni Bosco Hosp, Gen & Endoscop Surg Unit, Naples, Italy