1. Comprehensive Maternity and Perinatal Care Center Kyushu University Hospital Fukuoka Japan
2. Department of Perinatal and Pediatric Medicine Graduate School of Medical Sciences Kyushu University Fukuoka Japan
3. Department of Pediatrics Graduate School of Medical Sciences Kyushu University Fukuoka Japan
4. Department of Neonatal Intensive Care Kurashiki Central Hospital Kurashiki Japan
5. Division of Neonatology Nagano Children's Hospital Azumino Japan