1. Department of Obstetrics and Gynecology; Emory University School of Medicine; Atlanta GA USA
2. Division of Foodborne, Waterborne, and Environmental Diseases; Centers for Disease Control and Prevention; Atlanta GA USA
3. Department of Research; American College of Obstetricians and Gynecologists; Washington DC USA
4. Hubert Department of Global Health; Departments of Epidemiology and Environmental and Occupational Health; Rollins School of Public Health; Emory University; Atlanta GA USA
5. Division of Parasitic Diseases and Malaria; Center for Global Health; Centers for Disease Control and Prevention; Atlanta GA USA