1. Department of Environmental and Radiological Health Sciences, Colorado State University, Fort Collins, Colorado, USA
2. Beijing Innovation Center for Engineering Science and Advanced Technology and State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing, China
3. Department of Statistics, Colorado State University, Fort Collins, Colorado, USA
4. School of Forestry and Environmental Studies, Yale University, New Haven, Connecticut, USA
5. Department of Biostatistics, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA
6. National Institute of Environmental Health, Chinese Center for Disease Control and Prevention, Beijing, China
7. Institute of Urban Meteorology, China Meteorological Administration, Beijing, China