1. Registered Nurse, Neonatal Intensive Care Unit, The Catholic University of Korea, Seoul St. Mary's Hospital, Korea.
2. Unit Manager, Hematology Intensive Care Unit, The Catholic University of Korea, Seoul St. Mary's Hospital, Korea.
3. Registered Nurse, Neonatal Intensive Care Unit, The Catholic University of Korea, Eunpyeong St. Mary's Hospital, Korea.