1. Department of EpidemiologyRollins School of Public HealthEmory University Atlanta GA USA
2. Department of Environmental HealthRollins School of Public HealthEmory University Atlanta GA USA
3. School of Community Health SciencesUniversity of Nevada Reno NV USA
4. Centers for Disease Control and PreventionNational Institute for Occupational Safety and Health Cincinnati OH USA
5. Reproductive Endocrinology and InfertilityDepartment of Obstetrics and GynecologyEmory University School of Medicine Atlanta GA USA