[1] W Virginia Univ, Div Pediat Gastroenterol, Dept Pediat, Charleston, WV USA
[2] Sinai Hosp, Div Gastroenterol, Dept Med, Program Internal Med, Baltimore, MD 21215 USA
[3] Univ Maryland, Sch Med, Inst Genome Sci, Baltimore, MD 21201 USA
[4] Johns Hopkins Univ, Dept Pediat, Div Pediat Gastroenterol, Baltimore, MD 21218 USA
[5] Sinai Hosp, Dept Med, Div Gastroenterol, Baltimore, MD 21215 USA