Affiliation: | (1) Department of Pediatrics, Toho University Medical Center, Sakura Hospital, 564-1 Shimoshizu, Sakura-shi, Chiba 285-8741, Japan;(2) Department of Nephrology, Toho University Medical Center, Omori Hospital, Tokyo, Japan;(3) Department of Pediatrics, International University of Health and Welfare, Atami Hospital, Shizuoka, Japan |