[1] Univ Coll Hosp, London, England
[2] Univ Bologna, Dept Internal Med & Gastroenterol, Bologna, Italy
[3] Hop Beaujon, Dept Gastroenterol & Nutr, Clichy, France
[4] Hop Necker Enfants Malad, Dept Gastroenterol Hepatol & Nutr Pediat, Paris, France
[5] Childrens Mem Hlth Inst, Dept Pediat & Nutr, Warsaw, Poland
[6] Free Univ Brussels, Dept Med Surg Gastroenterol, Hop Erasme, Brussels, Belgium
[7] Ninewells Hosp & Med Sch, Dundee, Scotland
[8] Charite, Dept Surg, Berlin, Germany
[9] Univ Hosp Nice, Dept Gastroenterol & Clin Nutr, Nice, France
[10] Osped Pediat Bambino Gesu, Gastroenterol & Nutr Unit, Rome, Italy
[11] CHU Lille, Clin Pediat, Lille, France
[12] Hosp 12 Octobre, Unit Nutr Clin & Dietet, Madrid, Spain
[13] Rigshosp, Dept Gastroenterol, Copenhagen, Denmark