1. U.S. EPA Office of Air Quality Planning and Standards, Research Triangle Park, North Carolina
2. Harvard T.H. Chan School of Public Health, Boston, Massachusetts
3. Department of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, Massachusetts
4. Department of Biostatistics, Harvard T.H. Chan School of Public Health, Boston, Massachusetts
5. Oak Ridge Institute for Science and Education at the Center for Public Health and Environmental Assessment, Office of Research and Development, United States Environmental Protection Agency, Research Triangle Park, North Carolina
6. National Health and Environmental Effects Research Lab, U.S. Environmental Protection Agency, Research Triangle Park, North Carolina