[1] Erasmus MC, Sophia Childrens Hosp, Rotterdam, Netherlands
[2] Schneider Childrens Hosp, Petah Tiqwa, Israel
[3] Tel Aviv Univ, Sackler Fac Med, Tel Aviv, Israel
[4] Univ Hosp Motol, Dept Paediat, Prague, Czech Republic
[5] Univ Messina, Pediat Gastroenterol & Cyst Fibrosis Unit, Messina, Italy
[6] Royal Hosp Children, Glasgow, Lanark, Scotland
[7] Southampton Childrens Hosp, Dept Paediat, Tremona Rd, Southampton, Hants, England
[8] Med Univ Graz, GPGE Educ Ctr Paediat Gastroenterol, Dept Paediat & Adolescence Med, Graz, Austria
[9] Bambino Gesu Children Hosp, Hepatol Gasroenterol & Nutr Unit, Rome, Italy
[10] Univ Florence, Meyer Hosp, Dept Neurosci Psychol Pharmacol & Childs Hlth, Florence, Italy
[11] Univ Campania Luigi Vanvitelli, Dept Woman Child & Gen & Specialist Surg, Naples, Italy
[12] Univ Debrecen, Inst Pediat, Debrecen, Hungary
[13] Harvard Med Sch, MassGeneral Hosp Children, Boston, MA 02115 USA
[14] Univ Med Ctr Utrecht, Wilhelmina Childrens Hosp, Dept Paediat Gastroenterol, Utrecht, Netherlands
[15] Jagiellonian Univ, Coll Med, Dept Paediat Gastroenterol & Nutr, Krakow, Poland
[16] Erasmus MC, Hosp Pharm, Rotterdam, Netherlands
[17] Katholieke Univ Leuven, Dept Pharmaceut & Pharmacol Sci, Leuven, Belgium
[18] Hosp Sao Joao, Dept Paediat, Pediat Gastroenterol, Porto, Portugal