1. Department of Biomedical Laboratory Science, College of Health Science, Eulji University, Seongnam, Korea.
2. Department of Obstetrics and Gynecology, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA.
3. Olson Center for Women's Health, Department of Obstetrics and Gynecology, and Fred and Pamela Buffett Cancer Center, University of Nebraska Medical Center, Omaha, NE, USA.
4. Department of Obstetrics and Gynecology, Korea University College of Medicine, Seoul, Korea.