1. School of Medicine, University of California San Francisco, San Francisco, CA
2. Environmental Health Investigations Branch, California Department of Public Health, Richmond, CA
3. Department of Emergency Medicine, University of California San Francisco, San Francisco, CA
4. Department of Medicine, University of California San Francisco, San Francisco, CA
5. Occupational Health Branch, California Department of Public Health, Richmond, CA
6. National Health and Environmental Effects Research Laboratory, Office of Research and Development, United States Environmental Protection Agency, Durham, NC