[1] LMU Univ Hosp Munich, Dr von Hauner Childrens Hosp, Dept Pediat, Lindwurmstr 4, D-80337 Munich, Germany
[2] Fac Publ Hlth, Dept Hyg & Epidemiol, Res Grp NutriLect, Varna, Bulgaria
[3] Prof Paraskev Stoyanov Med Univ, Res Inst, Dept Neurosci, Varna, Bulgaria
[4] Childrens Hosp Zagreb, Referral Ctr Pediat Gastroenterol & Nutr, Zagreb, Croatia
[5] Med Univ Graz, Dept Paediat & Adolescent Med, Graz, Austria
[6] Emma Childrens Hosp, Dept Pediat Gastroenterol Hepatol & Nutr, Amsterdam UMC, Amsterdam, Netherlands
[7] Hop Necker Enfants Malad, Pediat Gastroenterol Nutr & Hepatol Units, Paris, France
[8] Hosp Papa Giovanni XXIII, Hepatol Gastroenterol & Transplantat Unit, Bergamo, Italy
[9] Childrens Mem Hlth Inst, Dept Gastroenterol Hepatol Nutr Disturbances & Ped, Warsaw, Poland
[10] European Soc Paediat Gastroenterol Hepatol & Nutr, Geneva, Switzerland
[11] Univ Glasgow, Dept Human Nutr, Glasgow, Scotland
[12] Univ Warmia & Mazury, Dept Pediat Gastroenterol & Nutr, Sch Med, Coll Med, Olsztyn, Poland