1. Department of Dermatology, University of California, San Francisco
2. Dermatology Service, San Francisco Veterans Affairs Medical Center, San Francisco, California
3. School of Public Health, University of California, Berkeley
4. Department of Epidemiology and Biostatistics, University of California, San Francisco
5. Department of Medical Statistics, London School of Hygiene & Tropical Medicine, London, United Kingdom
6. Office of Health Equity, California Department of Public Health, Richmond
7. Division of Occupational and Environmental Medicine, University of California, San Francisco