1. University of California (UC) Berkeley–UC San Francisco (UCSF) Joint Medical Program, UC Berkeley School of Public Health and UCSF School of Medicine, Berkeley and San Francisco, California, USA
2. Department of Epidemiology, Columbia University Mailman School of Public Health, New York, New York, USA
3. School of Public Health and Department of Environmental Science, Policy and Management, UC Berkeley, Berkeley, California, USA
4. Department of Environmental Health Sciences, Columbia University Mailman School of Public Health, New York, New York, USA