1 Department of Pediatrics (Y.N., K. Hirohata, R.I., A.O.), Graduate School of Medicine, The University of Tokyo; Department of Human Genetics (K. Hamanaka, S.M., N.M.), Graduate School of Medicine, Yokohama City University; Department of Pediatrics (M.M.), School of Medicine, Teikyo University, Tokyo; and Department of Pediatrics (H.S.), Graduate School of Medicine, Osaka City University, Osaka, Japan.