1 From the Department of Pediatrics (T.W., S.F., K.T., S.K., T.T., Y.K.), Sapporo Medical University School of Medicine; Department of Pediatrics (S.T.), Asahikawa Medical University, Hokkaido; Division of Medical Genetics (K.K.), Kanagawa Children's Medical Center; and Departments of Gastroenterology (S.M.) and Pediatrics (T.W., Y.S.), Hakodate Municipal Hospital, Japan.
2 From the Department of Pediatrics (T.W., S.F., K.T., S.K., T.T., Y.K.), Sapporo Medical University School of Medicine; Department of Pediatrics (S.T.), Asahikawa Medical University, Hokkaido; Division of Medical Genetics (K.K.), Kanagawa Children's Medical Center; and Departments of Gastroenterology (S.M.) and Pediatrics (T.W., Y.S.), Hakodate Municipal Hospital, Japan. fukumura@sapmed.ac.jp.