[1] Univ Med Ctr Rotterdam, Erasmus MC Sophia Childrens Hosp, Dept Pediat, Div Gastroenterol, Rotterdam, Netherlands
[2] Univ Med Ctr Rotterdam, Erasmus MC Sophia Childrens Hosp, Dept Child & Adolescent Psychiat Psychol, Dept Child & Adolescent Psychiat Psychol, Rotterdam, Netherlands
[3] Univ Amsterdam, AMC Emma Childrens Hosp, Dept Pediat, Div Gastroenterol,Med Ctr, Amsterdam, Netherlands
[4] Leiden Univ, Willem Alexander Childrens Hosp, Dept Pediat, Div Gastroenterol,Med Ctr, Leiden, Netherlands
[5] Univ Med Ctr Rotterdam, Erasmus MC Sophia Childrens Hosp, Dept Pediat Surg, Dept Pediat Surg, Rotterdam, Netherlands
[6] Univ Med Ctr Rotterdam, Erasmus MC Sophia Childrens Hosp, Dept Pediat, Dept Pediat,Div Gastroenterol, Dr Molewaterplein 40, NL-3015 GD Rotterdam, Netherlands