1 SickKids Inflammatory Bowel Disease Centre, The Hospital for Sick Children, Toronto, Ontario, Canada.
2 Division of Gastroenterology and Hepatology, Saitama Children's Medical Center, Saitama, Japan.
3 Department of Pediatrics, Queen's University, Kingston, Ontario, Canada.
4 Division of Pathology, Saitama Children's Medical Center, Saitama, Japan.
5 Department of Clinical Research, Saitama Children's Medical Center, Saitama, Japan.
6 Department of Pediatrics, Gunma University Graduate School of Medicine, Maebashi, Gunma, Japan.
7 Department of Pediatrics, Institute of Medical Science and Biochemistry, The Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada.