1. Department of Radiation Oncology, Jeonbuk National University Hospital, Jeonju, Republic of Korea
2. Research Institute of Clinical Medicine of Jeonbuk National University-Biomedical Research Institute of Jeonbuk National University Hospital, Jeonju, Republic of Korea
3. Department of Obstetrics and Gynecology, Jeonbuk National University Hospital, Jeonju, Republic of Korea.