1. Division of Epidemiology, UC Berkeley School of Public Health, Berkeley, CA, USA
2. Center for Population Health Sciences, Stanford University, Stanford, CA, USA
3. Division of Environmental Health Sciences, UC Berkeley School of Public Health, Berkeley, CA, USA
4. Department of Environmental and Radiological Health Sciences, Colorado State University, Fort Collins, CO, USA
5. Department of Internal Medicine, Yale University School of Medicine, New Haven, CT, USA
6. Department of Economics, San Francisco State University, College of Business, San Francisco, CA, USA