Mitsuru Ikeno¹, shinpei abe¹, taiki shima¹, masaaki hori², shinichi niijima³, shigeki aoki², toshiaki shimizu¹ (1.Department of Pediatrics Juntendo University Faculty of Medicine, Tokyo, Japan, 2.Department of Radiology Juntendo University Faculty of Medicine, Tokyo, Japan, 3.Departoment of Pediatrics, Juntendo University Nerima Hospital, Tokyo, Japan)

Kensuke Fujishiro¹, Katsunori Fujii¹, Tomoko Uchida¹, Tadashi Shiohama¹, Katsuki Sugita², rie Sakamoto³, Eiji Katou³, Naoki Shimojyou¹ (1.Pediatrics, University of Chiba, Chiba, Japan, 2.Department of Education, University of Chiba, Chiba, Japan, 3.Neonatology, Funabashi Central Hospital, Funabashi, Japan)

Akihito Takeuchi^1,2, Motoharu Ochi^1,3, Mariko Hattori¹, Takushi Inoue^2,3 (1.Division of Neonatology, NHO Okayama Medical Center, 2.Division of Neuropediatrics, NHO Okayama Medical Center, 3.Department of Pediatics, NHO Okayama Medical Center)

Toru Kato, Ryosuke Suzui, Takeshi Tsuji, Fumio Hayakawa (Department of Pediatrics, Okazaki City Hospital)

Yuya Sato¹, Kyoko Hirasawa¹, akiko Takeshita¹, ken imai², satoru nagata¹ (1.Tokyo Women's Medical University Hospital, Tokyo, Japan, 2.Tokyo Women's Medical University Hospital, Tokyo, Japan)

Kyouko Hirasawa¹, Akiko Takeshita^1,2, Yuya Sato¹, Ken Imai², Satoru Nagata¹ (1.The Development of Pediatrics, Tokyo Women's Medical University, Tokyo, Japan, 2.Department of Perinatology, Maternal and Perinatal center, Tokyo Women's Medical Center)

Hirosuke Inoue^1,2, YUKI MATSUSHITA^1,2, MASAYUKI OCHIAI^1,2, YOSHITO ISHIZAKI¹, MASAYUKI SANEFUJI¹, YASUNARI SAKAI¹, SHOUICHI OHGA^1,2 (1.Department of Pediatrics, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan, 2.Comprehensive Maternity and Perinatal Care Center, Kyushu University, Fukuoka, Japan)