[1] Catholic Univ Korea, Dept Obstet & Gynecol, Incheon St Marys Hosp, Inchon 403720, South Korea
[2] Catholic Univ Korea, Dept Radiol, Incheon St Marys Hosp, Inchon 403720, South Korea
[3] Catholic Univ Korea, Dept Radiat Oncol, Incheon St Marys Hosp, Inchon 403720, South Korea
[4] Catholic Univ Korea, Dept Hematooncol, Incheon St Marys Hosp, Inchon 403720, South Korea