[1] Univ Calif San Diego Hlth, Dept Med, San Diego, CA USA
[2] Univ Calif San Diego, Sch Med, San Diego, CA USA
[3] RTI Int, RTI Int Univ North Carolina Chapel Hill Evidence, Res Triangle Pk, NC USA
[4] Univ Calif San Francisco, Social Intervent Res & Evaluat Network, San Francisco, CA USA
[5] Univ Calif San Francisco, Sch Med, Dept Family & Community Med, Ctr Hlth & Community, San Francisco, CA USA
[6] Univ Chicago, Sect Gen Internal Med, MacLean Ctr Clin Med Eth, Ctr Study Race Polit & Culture, Chicago, IL USA