[1] Osped Rovigo, Azienda ULSS5 Polesana, Dipartimento Chirurg Gen & Metab, I-45010 Rovigo, Italy
[2] Azienda Osped Univ Careggi, I-50134 Florence, Italy
[3] Univ Firenze, I-50134 Florence, Italy
[4] Univ Napoli Federico II, Dipartimento Sci Biochim Avanzate, I-80138 Naples, Italy
[5] ASST Fatebenefratelli Sacco, I-20157 Milan, Italy
[6] Policlin Univ G Martino Messina, I-98124 Messina, Italy
[7] Osped San Giuseppe, I-20100 Milan, Italy
[8] UOC Chirurg Gen & Bariatr, Ist Clin Alta Specialita San Gaudenzio Novara, Grp Policlin Monza, I-28100 Novara, Italy
[9] Univ Salerno, AOU San Giovanni Dio & Ruggi Aragona Ospedale G Fu, Salerno, Italy
[10] Asl 3, I-51100 Pistoia, Pistoia, Italy
[11] Univ Padua Polyclin, I-35128 Padua, Italy
[12] Policlin San Marco, I-24046 Bergamo, Italy
[13] Univ Cattolica Sacro Cuore, Fdn Policlin Univ Agostino Gemelli IRCCS, I-00168 Rome, Italy
[14] Azienda Osped Univ Pisana, I-56126 Pisa, Italy
[15] Univ Roma Tor Vergata, Roma & Maria Cecilia Hosp, Osped San Carlo Nancy, Dipartimento Chirurg Bariatr & Metab, I-00165 Cotignola, Ravenna, Italy
[16] ASL NAPOLI2 nord, Dist 41 UOMI, I-80027 Naples, Italy
[17] Azienda Osped Santa Maria Terni, SC Diabetol Dietol & Nutr Clin, I-05100 Terni, Italy
[18] Univ Roma Tor Vergata, I-00133 Rome, Italy
[19] Osped Santa Maria Nuova Chirurg Gen, Bariatr Azienda Sanit Toscana Ctr, I-50122 Florence, Italy
[20] UOC Chirurg Gen & Urgenza, Arnas Garibaldi, I-95123 Catania, Italy
[21] Univ Roma La Sapienza, Dipartimento Chirurg, AOU Policlin Umberto 1, I-00161 Rome, Italy
[22] UO Chirurg Bariatr & Metab, AORN A Cardarelli Napoli, I-80131 Naples, Italy
[23] Osped GBMorgagni, Chirurg Endocrina & Metab, I-47121 Forli, Italy
[24] ASS2 Isontina, Dipartimento Chirurg Presidio Osped Gorizia Monfa, I-34170 Gorizia, Italy