1. Department of Environmental Sciences and Engineering, Gillings School of Global Public Health, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
2. Curriculum in Toxicology, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
3. The Institute for Environmental Health Solutions, Gillings School of Global Public Health, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
4. Department of Obstetrics & Gynecology, Division of Maternal Fetal Medicine, Baylor College of Medicine, Houston, Texas 77030, United States
5. Department of Earth and Atmospheric Sciences, University of Houston, Houston, Texas 77004, United States
6. Tropospheric Composition Program, Earth Science Division, NASA, Washington, District of Columbia 20546, United States