[1] Harvard Med Sch, Boston Childrens Hosp, Div Gastroenterol Hepatol & Nutr, Boston, MA USA
[2] Hannover Med Sch, Div Paediat Gastroenterol & Hepatol, Dept Paediat Kidney Liver & Metab Dis, Hannover, Germany
[3] Yale Univ, Sch Med, Yale New Haven Hosp Transplantat Ctr, New Haven, CT USA
[4] Karolinska Inst, CLINTEC, Karolinska Univ Hosp, Dept Pediat, Stockholm, Sweden
[5] Kings Coll Hosp London, Paediat Ctr Hepatol Gastroenterol & Nutr, London, England
[6] Univ Colorado, Sch Med, Sect Pediat Gastroenterol Hepatol & Nutr, Childrens Hosp Colorado, Aurora, CO USA
[7] Univ Hosp Geneva, Swiss Ctr Liver Dis Children, Geneva, Switzerland
[8] Indiana Univ, Sch Med, Riley Hosp Children, Indianapolis, IN USA
[9] Brown Univ, Div Pediat Gastroenterol Hepatol & Nutr, Hasbro Childrens Hosp, Warren Alpert Sch Med, Providence, RI 02912 USA
[10] Univ Toronto, Div Pediat Gastroenterol Hepatol & Nutr, Hosp Sick Children, Toronto, ON, Canada
[11] Emory Univ, Sch Med, Dept Pediat, Childrens Healthcare Atlanta, 1760 Haygood Dr,HSRB E204, Atlanta, GA 30322 USA