1. Department of Neonatology Nagasaki Harbor Medical Center Nagasaki Japan
2. Departments of Department of Neonatology Kagoshima City Hospital KagoshimaJapan
3. Department of Emergency Medicine Kagoshima City Hospital KagoshimaJapan
4. Department of Obstetrics Kagoshima City Hospital KagoshimaJapan
5. Department of Obstetrics Funabashi Central Hospital Chiba Japan