1 Department of Pediatrics (Y.S., T. Mizuno, K.M.), Tokyo Medical and Dental University, Yushima, Bunkyo-ku; Home Care Clinic for Children Aozora Sumida (H.I.), Higashikomagata, Sumida-ku, Tokyo; Department of Pediatrics (M.K.), Showa University School of Medicine, Hatanodai, Shinagawa-ku, Tokyo; Department of Human Genetics (M.N., T. Mizuguchi, N.M.), Yokohama City University Graduate School of Medicine, Fukuura, Kanazawa-ku, Yokohama; Department of Biochemistry (M.N.), Hamamatsu University School of Medicine, Handayama, Higashi-ku Hamamatsu; and Present Address: Department of Pediatrics (Y.S.), Soka Municipal Hospital, Soka, Soka-Shi, Saitama-Ken, Japan.