[1] Univ Calif Los Angeles, Fielding Sch Publ Hlth, Dept Hlth Policy & Management, Los Angeles, CA USA
[2] Jonsson Comprehens Canc Ctr, Div Canc Prevent & Control, Los Angeles, CA 90034 USA
[3] Virginia Commonwealth Univ, Dept Family Med & Populat Hlth, Richmond, VA 23284 USA
[4] VA Healthcare Syst, Ctr Hlth Qual Outcomes & Econ Res, Bedford, MA USA
[5] Univ Vermont, Dept Family Med, Burlington, VT 05405 USA
[6] Natl Canc Inst, Div Canc Control & Populat Sci, Bethesda, MD USA