1. Department of Environmental and Radiological Health Sciences, Colorado State University, Fort Collins, Colorado, USA
2. School of Medicine, University of Colorado, Aurora, Colorado, USA
3. Universities Space Research Association, NASA Marshall Space Flight Center, Huntsville, Alabama, USA
4. Cooperative Institute for Research in the Atmosphere, Colorado State University, Fort Collins, Colorado, USA
5. Department of Industrial and Operations Engineering, University of Michigan, Ann Arbor, Michigan, USA
6. Department of Geography, Ohio State University, Columbus, Ohio, USA
7. Department of Statistics, University of Illinois at Urbana-Champaign, Champaign, Illinois, USA
8. Beijing Innovation Center for Engineering Science and Advanced Technology and State Key Joint Laboratory of Environmental Simulation and Pollution Control, Peking University, Beijing, China
9. Department of Biostatistics, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA