1. Department of Obstetrics and Gynecology, Faculty of Medicine, Khon Kaen University, Khon Kaen
2. Department of Obstetrics and Gynecology, Faculty of Medicine, King Chulalongkorn Memorial Hospital, Bangkok, Thailand
3. Department of Clinical Epidemiology, University of the Philippines, Manila, The Philippines
4. Coombe Women's Hospital, Dublin, Ireland
5. Respiratory Diseases Branch
6. Biostatistics and Information Management Branch, Division of Bacterial and Mycotic Diseases, National Centers for Infectious Diseases, Centers for Disease ControlPrevention, Atlanta, Georgia
7. Department of Obstetrics and Gynaecology, University of Zimbabwe School of Medicine, Harare, Zimbabwe
8. Department of Obstetrics and Gynaecology, Institute of Medicine, Yangon, Myanmar
9. Department of Obstetrics and Gynecology, Divisions of Research in Reproductive Health and Maternal-Fetal Medicine, Thomas Jefferson University, Philadelphia, Pennsylvania