[1] Childrens Mercy Hosp, Comprehens Colorectal Ctr, Dept Surg, Kansas City, MO 64108 USA
[2] Childrens Mercy Kansas City, Div Pediat Gastroenterol Hepatol & Nutr, Kansas City, MO 64108 USA
[3] Univ Missouri Kansas City, Dept Pediat, Kansas City, MO 64108 USA
[4] Univ Missouri Kansas City, Dept Surg, Kansas City, MO 64108 USA
[5] Childrens Natl Med Ctr, Div Colorectal & Pelv Reconstruct, Washington, DC 20010 USA