1. Center for Cohort Studies, Total Healthcare Center, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
2. Department of Obstetrics and Gynecology, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
3. Department of Obstetrics and Gynecology, Seoul National University College of Medicine, Seoul, Republic of Korea
4. Departments of Epidemiology and Medicine, and Welch Center for Prevention, Epidemiology, and Clinical Research, Johns Hopkins University Bloomberg School of Public Health, Baltimore, MD
5. Department of Precision Medicine, National Institute of Health, Korea Disease Control and Prevention Agency, Cheongju, Republic of Korea