[1] Hebrew Univ Jerusalem, Shaare Zedek Med Ctr, Jerusalem, Israel
[2] Univ Paris 05, Hop Necker Enfants Malad, AP HP, Sorbonne Paris Cite, Paris, France
[3] Univ Toronto, Hosp Sick Children, Toronto, ON, Canada
[4] Hosp St Joan de Deu, Barcelona, Spain
[5] Univ Hosp Motol, Dept Paediat, Prague, Czech Republic
[6] Semmelweis Univ, Dept Pediat, Budapest, Hungary
[7] Sapienza Univ Rome, Pediat Gastroenterol & Liver Unit, Rome, Italy
[8] Univ Campania Luigi Vanvitelli, Dept Woman Child & Gen & Specialist Surg, Naples, Italy
[9] Univ Childrens Hosp, Zurich, Switzerland
[10] Schneider Childrens Hosp, Petah Tiqwa, Israel
[11] Tel Aviv Univ, Sackler Fac Med, Tel Aviv, Israel
[12] Univ Messina, Pediat Dept, Messina, Italy
[13] Royal Coll Surgeons Ireland, Natl Childrens Res Ctr, Dublin, Ireland
[14] Univ Coll Dublin, Dublin, Ireland
[15] Southampton Childrens Hosp, Southampton, Hants, England
[16] Univ Helsinki, Childrens Hosp, Dept Pediat Surg, Helsinki, Finland
[17] Erasmus MC Sophia Childrens Hosp, Rotterdam, Netherlands
[18] Med Sch, Ioannina, Greece
[19] Univ Hosp Ioannina, Ioannina, Greece
[20] Queen Mary Univ London, Barts & London Sch Med, London, England
[21] IBIMA, Hosp Materno, Pediat Gastroenterol & Nutr Unit, Malaga, Spain
[22] Univ Edinburgh, Child Life & Hlth, Edinburgh, Midlothian, Scotland
[23] Univ British Columbia, BC Childrens Hosp, Vancouver, BC, Canada
[24] Royal Hosp Children, Glasgow, Lanark, Scotland