1. Mitchell H. Katz ( ) is the director of health services for the County of Los Angeles and a clinical professor of medicine, epidemiology, and biostatistics at the University of California, San Francisco. At the time he wrote this paper, he was the director of health for the City and County of San Francisco.
2. Tangerine M. Brigham is deputy director of health for the City and County of San Francisco and the director of the Healthy San Francisco program.