[1] Univ Naples Federico II, Sect Pediat, Dept Translat Med Sci, Naples, Italy
[2] Tel Aviv Univ, Sackler Fac Med, Schneider Childrens Med Ctr, Inst Gastroenterol Nutr & Liver Dis, Tel Aviv, Israel
[3] Sapienza Univ Rome, Pediat Gastroenterol & Liver Unit, Rome, Italy
[4] Univ Childrens Hosp Zurich, Div Gastroenterol & Nutr, Zurich, Switzerland
[5] Charles Univ Prague, Fac Med 2, Dept Paediat, Gastroenterol & Nutr Unit, Prague, Czech Republic
[6] Motol Univ Hosp, Prague, Czech Republic
[7] Sophia Childrens Univ Hosp, Erasmus MC, Dept Paediat Gastroenterol, Rotterdam, Netherlands
[8] Univ Zagreb, Sch Med, Children Hosp Zagreb, Dept Gastroenterol, Zagreb, Croatia
[9] Ludwig Maximilians Univ Munchen, Dr von Hauner Childrens Hosp, Munich, Germany
[10] Sackler Sch Med, Wolfson Med Ctr, Tel Aviv, Israel
[11] Univ Florence, Meyer Children Hosp, Florence, Italy
[12] Univ Paris 05, Univ Sorbonne Paris Cite, Paris, France
[13] Hop Necker Enfants Malad, AP HP, Serv Gastroenterol Pediat, Paris, France
[14] Royal Hosp Children, Dept Paediat Gastroenterol, Glasgow, Lanark, Scotland
[15] Dalhousie Univ, IWK Hlth Ctr, Div Pediat Gastroenterol & Nutr, Dept Pediat, Halifax, NS, Canada
[16] Free Univ Brussels, Univ Hosp Brussels, Dept Paediat Gastroenterol & Nutr, Brussels, Belgium