| Affiliation: | 1. Department of Pediatrics and Child Health, Nihon University School of Medicine, Tokyo, Japan;2. Division of Neonatal Medicine, Center for Maternal Fetal and Neonatal Medicine, Saitama Medical University Kawagoe Medical Center, Saitama, Japan;3. Division of Neonatal Medicine, Department of Pediatrics, Saitama Medical University Hospital, Saitama, Japan;4. Department of Pediatrics Niigata University, Niigata, Japan;5. Department of Pediatrics, St Luke's International Hospital, Tokyo, Japan;6. Division of Neonatology, Perinatal Medical Center, Kagoshima City Hospital, Kagoshima, Japan |
