1. Department of Obstetrics and Gynecology, Gyeongsang National University Hospital, Jinju, Korea.
2. Institute of Health Sciences, Gyeongsang National University, Jinju, Korea.
3. Department of Obstetrics and Gynecology, Gyeongsang National University College of Medicine, Jinju, Korea.
4. Biostatistics Cooperation Center, Gyeongsang National University Hospital, Jinju, Korea.
5. Department of Laboratory Medicine, Gyeongsang National University Hospital, Jinju, Korea.
6. Department of Laboratory Medicine, Gyeongsang National University College of Medicine, Jinju, Korea.