[1] Lucerne Childrens Hosp, Dept Pediat Surg, Luzern, Switzerland
[2] Cincinnati Childrens Hosp Med Ctr, Dept Pediat Gen & Thorac Surg, Cincinnati, OH USA
[3] Federico II Univ Hosp, Div Pediat Surg, Naples, Italy
[4] Northwestern Univ, Ann & Robert H Lurie Childrens Hosp Chicago, Feinberg Sch Med, Div Pediat Surg,Dept Surg, Chicago, IL USA
[5] Stryker Nederland BV, Stryker Endoscopy, NL-1101 CM Amsterdam, Netherlands
[6] Childrens Mem Hlth Inst, Dept Pediat Surg & Organ Transplantat, PL-04730 Warsaw, Poland
[7] Val dHebron Matern & Childrens Hosp, Div Pediat Surg, Barcelona, Spain
[8] Birmingham Womens & Childrens NHS Fdn Trust, Dept Paediat Surg & Urol, Birmingham, England
[9] Univ Texas Southwestern Med Ctr, Dallas, TX 75235 USA
[10] Univ Montreal, Div Pediat Surg, Ctr Hosp Univ Ste Justine, Montreal, PQ, Canada
[11] Rocky Mt Hosp Children, Dept Surg, Div Pediat Surg, Denver, CO 80205 USA
[12] Univ Med Ctr Utrecht, Wilhelmina Childrens Hosp, Div Child Hlth, Pediat Surg, NL-3584 EA Utrecht, Netherlands
[13] Univ Pittsburgh, UPMC Childrens Hosp Pittsburgh, Div Pediat Gen & Thorac Surg, Pittsburgh, PA USA
[14] Boston Childrens Hosp, Dept Surg, Boston, MA USA
[15] Childrens Mercy Kansas City, Comprehens Colorectal Ctr, Dept Pediat Surg, Sect Colorectal & Pelv Reconstruct Surg, Kansas City, MO 64108 USA
[16] Univ Missourie Kansas City, Kansas City, MO 64108 USA
[17] Univ Birmingham, Inst Canc & Genom Sci, Canc Res UK Clin Trials Unit, Birmingham, England