1. Department of Medicine, University of California, Irvine, CA, USA
2. Vision Air Consulting, Chapel Hill, NC, USA
3. American Petroleum Institute, Washington, DC, USA
4. Clean Air Task Force, Boston, MA, USA
5. University of North Carolina, Chapel Hill, NC, USA
6. Department of Earth and Environmental Sciences and Lamont–Doherty Earth Observatory of Columbia University, Palisades, NY, USA