1. California Department of Health Services, Berkeley, California, USA
2. California Department of Health Services, Berkeley, California, USACenters for Disease Control and Prevention, Atlanta, Georgia, USA
3. California Department of Health Services, Sacramento, California, USA
4. Los Angeles Zoo, Los Angeles, California, USA
5. City of Los Angeles Occupational Health Services Division, Los Angeles, California, USA
6. Los Angeles County Department of Health Services, Los Angeles, California, USA