[1] Univ Michigan, Sch Publ Hlth, Dept Biostat, Ann Arbor, MI 48109 USA
[2] Texas Childrens Hosp, Baylor Coll Med, Div Gastroenterol Hepatol & Nutr, Dept Pediat, Houston, TX 77030 USA
[3] Indiana Univ Sch Med, Pediat Gastroenterol Hepatol & Nutr, Riley Hosp Children IU Hlth, Indianapolis, IN 46202 USA
[4] Univ Toronto, Dept Pediat, Hosp Sick Children, Toronto, ON, Canada
[5] Univ Washington, Div Gastroenterol & Hepatol, Seattle, WA 98195 USA
[6] Seattle Childrens Hosp, Seattle, WA USA
[7] Washington Univ, Sch Med, Mallinckrodt Inst Radiol, St Louis, MO USA
[8] Indiana Univ Sch Med, Riley Hosp Children IU Hlth, Pediat Radiol, Indianapolis, IN 46202 USA
[9] Childrens Hosp Colorado, Div Pediat Radiol, Aurora, CO USA
[10] Univ Colorado, Sch Med, Aurora, CO USA
[11] Texas Childrens Hosp, Div Radiol, Houston, TX 77030 USA
[12] Emory Univ, Sch Med, Dept Radiol, Atlanta, GA 30322 USA
[13] Childrens Healthcare Atlanta, Atlanta, GA USA
[14] Univ Toronto, Dept Med Imaging, Toronto, ON, Canada
[15] Hosp Sick Children, Dept Diagnost Imaging, Toronto, ON, Canada
[16] Univ Washington, Dept Radiol, Seattle, WA 98195 USA
[17] Cincinnati Childrens Hosp Med Ctr, Div Pediat Gastroenterol Hepatol & Nutr, Cincinnati, OH 45229 USA
[18] Univ Cincinnati, Coll Med, Dept Pediat, Cincinnati, OH USA
[19] Cincinnati Childrens Hosp Med Ctr, Dept Radiol, Cincinnati, OH 45229 USA
[20] Univ Cincinnati, Coll Med, Dept Radiol, Cincinnati, OH USA
[21] Ann & Robert H Lurie Childrens Hosp, Div Pediat Gastroenterol Hepatol & Nutr, Chicago, IL USA
[22] Johns Hopkins Sch Med, Div Pediat Gastroenterol Hepatol & Nutr, Baltimore, MD USA
[23] Univ Minnesota, Pediat Gastroenterol, Mason Childrens Hosp, Minneapolis, MN USA
[24] Lucile Packard Childrens Hosp, Pediat Radiol, Palo Alto, CA USA
[25] Univ Michigan, Sch Med, Dept Surg, Ann Arbor, MI USA
[26] Childrens Hosp Colorado, Digest Hlth Inst, Aurora, CO USA
[27] Univ Colorado, Sch Med, Sect Pediat Gastroenterol Hepatol & Nutr, Dept Pediat, Aurora, CO USA
[28] Emory Univ, Sch Med, Childrens Healthcare Atlanta, Div Pediat Gastroenterol Hepatol & Nutr, Atlanta, GA USA