1. Division of Viral Diseases Research, Center for Infectious Diseases Research, Korea National Institute of Health, Cheongju, Korea.
2. Center for Infectious Diseases Research, Korea National Institute of Health, Cheongju, Korea.
3. Department of Obstetrics and Gynecology, Keimyung University Dongsan Medical Center, Daegu, Korea.
4. Department of Obstetrics and Gynecology, Chonnam National University Medical School, Gwangju, Korea.
5. Department of Pathology, Cheil General Hospital and Women’s Healthcare Center, Dankook University College of Medicine, Seoul, Korea.
6. Department of Obstetrics and Gynecology, Inje University Busan Paik Hospital, University College of Medicine, Busan, Korea.
7. Department of Preventive Medicine, The Catholic University of Korea College of Medicine, Seoul, Korea.
8. Department of Obstetrics and Gynecology, Seoul St. Mary's Hospital, The Catholic University of Korea College of Medicine, Seoul, Korea.
9. Department of Obstetrics and Gynecology, Cheil General Hospital and Women's Healthcare Center, Dankook University, Seoul, Korea.