1 Department of Obstetrics and Gynecology, Busan Paik Hospital, Inje University, 633-165 Gaegeum-dong Busanjin-gu, Busan, 614-735 South Korea.
2 Department of Obstetrics and Gynecology, Busan Paik Hospital, Inje University, 633-165 Gaegeum-dong Busanjin-gu, Busan, 614-735 South Korea ; Paik Institute for Clinical Research, Busan Paik Hospital, Inje University, Busan, South Korea.
3 Department of Pathology, Busan Paik Hospital, Inje University, Busan, South Korea.