[1] Univ Colorado Denver, Sch Med, Dept Pediat, Sect Pediat Gastroenterol Hepatol & Nutr, Aurora, CO 80045 USA
[2] Childrens Hosp, Pediat Liver Ctr, Aurora, CO USA
[3] Birmingham Childrens Hosp, Birmingham, W Midlands, England
[4] Baylor Coll Med, Dept Pediat, Div Gastroenterol Hepatol & Nutr, Houston, TX 77030 USA
[5] Seattle Childrens, Dept Pediat, Div Gastroenterol Hepatol & Nutr, Seattle, WA USA
[6] Univ Washington, Sch Med, Seattle, WA USA
[7] Johns Hopkins Med Inst, Dept Pediat, Sect Pediat Gastroenterol Hepatol & Nutr, Baltimore, MD 21205 USA
[8] Cincinnati Childrens Hosp & Med Ctr, Dept Pediat, Div Gastroenterol Hepatol & Nutr, Cincinnati, OH USA
[9] Univ Pittsburgh, Grad Sch Publ Hlth, Dept Epidemiol, Pittsburgh, PA USA
[10] Childrens Hosp Pittsburgh, Dept Pediat, Div Gastroenterol Hepatol & Nutr, Pittsburgh, PA USA