1 Department of Pediatrics, Yamagata City Hospital Saiseikan, Yamagata, Japan ; Division of Endocrinology and Metabolism, Tokyo Metropolitan Children's Medical Center, Tokyo, Japan.
2 Division of Endocrinology and Metabolism, Tokyo Metropolitan Children's Medical Center, Tokyo, Japan.
3 Division of Endocrinology and Metabolism, Tokyo Metropolitan Children's Medical Center, Tokyo, Japan ; Division of Genetic Research, Tokyo Metropolitan Children's Medical Center, Tokyo, Japan.