Affiliation: | 1. Department of Epidemiology, Rollins School of Public Health, Emory University, Atlanta, Georgia;2. Department of Pediatrics, Emory University School of Medicine, Atlanta, Georgia;3. Department of Gynecology and Obstetrics, Emory University School of Medicine, Atlanta, Georgia;4. Aflac Cancer Center, Department of Pediatrics, Emory University School of Medicine, Atlanta, Georgia |