[1] Sophia Childrens Univ Hosp, Erasmus MC, Univ Med Ctr Rotterdam, Dept Pediat Surg, Rotterdam, Netherlands
[2] Radboud Univ Nijmegen, Med Ctr, Dept Hlth Evidence, NL-6525 ED Nijmegen, Netherlands
[3] Univ Cincinnati, Coll Med, Cincinnati Childrens Hosp Med Ctr, Dept Pediat Surg,Colorectal Ctr Children, Cincinnati, OH USA
[4] Radboud Univ Nijmegen, Med Ctr, Dept Surg & Pediat Surg, NL-6525 ED Nijmegen, Netherlands