1 Social Interventions Research & Evaluation Network (SIREN), University of California San Francisco, San Francisco, California; Department of Family and Community Medicine, University of California San Francisco, San Francisco, California. Electronic address: caroline.fichtenberg@ucsf.edu.
2 Social Interventions Research & Evaluation Network (SIREN), University of California San Francisco, San Francisco, California; Department of Family and Community Medicine, University of California San Francisco, San Francisco, California.