This node is now inactive. (Merged with the Oregon-Hawaii Node to form the Western States Node in 2010)
The California-Arizona Node represents a partnership between researchers at the University of California, San Francisco and the University of Arizona, in collaboration with CTPs operating in both urban and rural locations (San Francisco, Oakland, Sacramento, and Tucson areas). Participating CTPs, several of which have multiple sites, include hospital-based and community-based programs, and include residential, outpatient, and methadone treatment approaches. Collectively, these CTPs serve a racially and ethnically diverse population of more than 16,000 patients per year.