1. Division of NeonatologyCenter for Maternal‐Neonatal Care Nagoya University HospitalNagoyaJapan
2. Department of NeonatologyJapanese Red Cross Nagoya Daiichi HospitalNagoyaJapan
3. Department of PediatricsTosei General HospitalAlchiJapan
4. Department of PediatricsAnjo Kosei HospitalAlchiJapan
5. Department of PediatricsOkazaki City HospitalAlchiJapan
6. Department of Pediatrics (2)Ogaki Municipal HospitalOgakiJapan
7. Department of Pediatrics, Central HospitalAichi Human Service CenterAlchiJapan