1. Department of Neonatal Medicine; Osaka Women's and Children's Hospital; Izumi Osaka Japan
2. Neonatal Research Network of Japan; Shinjuku Tokyo Japan
3. Maternity and Perinatal Center; Hokkaido University Hospital; Sapporo Hokkaido Japan
4. Neonatology; Japanese Red Cross Medical Center; Shibuya Tokyo Japan
5. Neonatology; Nagano Children's Hospital; Azumino Nagano Japan
6. Neonatology; Seirei Hamamatsu General Hospital; Hamamatsu Shizuoka Japan
7. Pediatrics; Nagoya City West Medical Center; Nagoya Aichi Japan
8. Neonatology; Japanese Red Cross Nagoya Daiichi Hospital; Nagoya Aichi Japan
9. Neonatology; Hyogo Prefectural Kobe Children's Hospital; Kobe Hyogo Japan
10. Neonatal Intensive Care; Kurashiki Central Hospital; Kurashiki Okayama Japan