Affiliation: | 1.Department of Neonatology, Kanagawa Children's Medical Center, Mutsukawa 2-138-4, Minami-ku, 232, Yokohama-city, Japan ;2.Department of Pathology, Kanagawa Children's Medical Center, Mutsukawa 2-138-4, Minami-ku, 232, Yokohama-city, Japan ; |