[1] Univ Childrens Hosp Zagreb, Zagreb, Croatia
[2] Univ Childrens Hosp, Zurich, Switzerland
[3] Univ Hosp Motol, Dept Paediat, Prague, Czech Republic
[4] Univ Granada, Dept Paediat, Granada, Spain
[5] Umea Univ, Dept Clin Sci Pediat, Umea, Sweden
[6] Newcastle Hosp NHS Trust, Newcastle Neonatal Serv, Newcastle Upon Tyne, Tyne & Wear, England
[7] Newcastle Univ, Newcastle Upon Tyne NE1 7RU, Tyne & Wear, England
[8] Univ Med Ctr Ljubljana, Univ Childrens Hosp, Dept Gastroenterol Hepatol & Nutr, Ljubljana, Slovenia
[9] Erasmus MC, Dept Pediat Gastroenterol, Sophia Childrens Hosp, Rotterdam, Netherlands
[10] Univ Bari, Pediat Gastroenterol Div, Osped Pediatr Giovanni 23, Bari, Italy
[11] Paris Descartes Univ, Necker Enfants Malades Hosp, AP HP, Paris, France
[12] Baylor Coll Med, CNRC, Houston, TX 77030 USA
[13] Munich Municipal Hosp, Harlaching Hosp, Dept Pediat, Munich, Germany
[14] Univ Copenhagen, Dept Nutr Exercise & Sports, Copenhagen, Denmark
[15] Copenhagen Univ Hosp, Rigshosp, Pediat Nutr Unit, Copenhagen, Denmark
[16] Vrije Univ Amsterdam, Med Ctr, Dept Pediat, Amsterdam, Netherlands
[17] Emma Childrens Hosp AMC, Dept Pediat, Amsterdam, Netherlands
[18] UCL Inst Child Hlth, Childhood Nutr Res Ctr, London, England