1. California Department of Public Health, Richmond, California, USA
2. Comite Civico Del Valle, Brawley, California, USA
3. Department of Environmental & Occupational Health Sciences, University of Washington, Seattle, Washington, USA
4. California Environmental Health Tracking Program, Public Health Institute, Oakland, California, USA
5. School of Public Health, University of California, Los Angeles, California, USA
6. Department of Environmental and Occupational Health Sciences, George Washington University, Washington, D.C., USA