1. Emory University School of Medicine, Department of Medicine, Division of Infectious Diseases, Atlanta, GA, USA
2. Emory University Rollins School of Public Health, Hubert Department of Global Health, Atlanta, GA, USA
3. Johns Hopkins Bloomberg School of Public Health, Department of International Health, Division of Global Disease Epidemiology and Control, Baltimore, MD, USA
4. University of Colorado Denver, Department of Pediatrics, Division of Infectious Diseases, Denver, CO, USA
5. University of Colorado School of Medicine, Department of Obstetrics and Gynecology, Division of Maternal Fetal Medicine, Denver, CO, USA
6. University of Kansas Medical Center, Department of Obstetrics and Gynecology, Kansas City, KS, USA
7. Emory University Rollins School of Public Health, Department of Epidemiology, Atlanta, GA, USA
8. Emory University School of Medicine, Department of Medicine, Division of Pediatrics, Atlanta, GA, USA