[1] Duke Univ, Sch Med, Durham, NC 27706 USA
[2] Oregon Hlth & Sci Univ, OHSU PSU Sch Publ Hlth, 3181 SW Sam Jackson Pk Rd, Portland, OR 97239 USA
[3] Univ Wisconsin Madison, Ctr Hlth Syst Res & Anal, Madison, WI 53706 USA
[4] Univ Wisconsin Madison, Ctr Hlth Enhancement Syst Studies, Madison, WI 53706 USA
[5] Treatment Res Inst, Policy Ctr, Philadelphia, PA USA
[6] Univ Calif San Francisco, Philip R Lee Inst Hlth Policy Studies, San Francisco, CA 94143 USA
[7] Univ Calif San Francisco, Dept Anthropol Hist & Social Med, San Francisco, CA 94143 USA