[1] Univ Roma Tor Vergata, Dept Surg Sci, Rome, Italy
[2] European Univ Cyprus, Dept Surg, Nicosia, Cyprus
[3] Mediterranean Hosp Cyprus, Dept Surg, Limassol, Cyprus
[4] UCL, Ctr Obes Res, London, England
[5] Natl Inst Hlth Res, Biomed Res Ctr, London, England
[6] Univ Hosp Padua, Ctr Study & Integrated Treatment Obes, DIMED, Internal Med 3,Dept Med, Padua, Italy
[7] Ponderas Acad Hosp Regina Maria, Dept Anesthesiol, Bucharest, Romania
[8] La Sapienza Univ Rome Polo Pontino, Fac Pharm & Med, Bariatr Ctr Excellence IFSO EC, Dept Med Surg Sci & Biotechnol, Via F Faggiana 1668, I-04100 Latina, Italy
[9] Univ Insubria, Osped Circolo, Dept Endocrine & Metab Surg, Varese, Italy
[10] Fdn Macchi, ASST Sette Laghi, Varese, Italy
[11] ULSS5 Veneto, Dept Gen Surg, Adria, Italy
[12] Univ Hosp Virgen del Rocio, Dept Gen & Digest Surg, Unit Innovat Minimally Invas Surg, Seville 41010, Spain
[13] Herzliya Med Ctr, Herzliyya, Israel
[14] Maastricht Univ, Dept Surg, Med Ctr, Maastricht, Netherlands
[15] UAB, Hosp St Pau, Barcelona, Spain
[16] Ponderas Acad Hosp Regina Maria, Dept Gen Surg, Bucharest, Romania
[17] Castelfranco & Montebelluna Hosp, Div Gen Surg, Treviso, Italy
[18] Tel Aviv Univ, Hasharon Hosp, Rabin Med Ctr, Sackler Sch Med,Dept Internal Med D, Tel Aviv, Israel
[19] Vienna Med Univ, Dept Surg, Div Gen Surg, Vienna, Austria
[20] Yeovil Dist Hosp NHS Fdn Trust, Dept Gen Surg, Yeovil, England
[21] OB Klin, Ctr Treatment Obes & Metab Disorders, Prague, Czech Republic
[22] Tel Aviv Univ, Sackler Sch Med, Tel Aviv, Israel
[23] Chaim Sheba Med Ctr, Dept Surg C, Ramat Gan, Israel
[24] Univ Liverpool, Inst Psychol Hlth & Soc, Dept Psychol Sci, Liverpool, Merseyside, England
[25] Gen Hosp Attica KAT, Emergency Dept, Athens, Greece
[26] Vrije Univ Amsterdam, Amsterdam, Netherlands
[27] Consorci Sanitari Anoia, Gen Surg Dept, Barcelona, Spain
[28] Univ Autonoma Barcelona, Vall DHebron Univ Hosp, Ctr Excellence EAC BC, Gen Surg Dept,Endocrine Metab & Bariatr Unit, Barcelona, Spain