[1] Univ Naples Federico II, Dept Translat Med Sci, Naples, Italy
[2] Hosp Gral de Agudos Dr I Pirovano, Pediat Gastroenterol & Nutr Sect, Caba, Argentina
[3] Semmelweis Univ, Pediat Gastroenterol, Budapest, Hungary
[4] Ege Univ, Tip Fak, Gastroenterol Klin, Izmir, Turkey
[5] Eskisehir Osmangazi Univ, Dept Pediat, Eskisehir, Turkey
[6] SGPGI, Dept Gastroenterol, Lucknow, Uttar Pradesh, India
[7] Vall dHebron Res Inst, Digest Syst Res Unit, Barcelona, Spain
[8] Hosp Nacl Cayetano Heredia, Gastroenterol Pediat, Lima, Peru
[9] Rabat Univ, Dept Pediat, Pediat Gastroenterol, Rabat, Morocco
[10] South City Hosp, Dept Pediat Gastroenterol, Karachi, Pakistan
[11] 3rd Hosp Hebei Med, Shijiazhuang, Hebei, Peoples R China