[1] Western Univ, Schulich Interfac Program Publ Hlth, London, ON, Canada
[2] United Hlth Grp, Cypress, CA USA
[3] David Geffen Sch Med, Dept Med, Los Angeles, CA USA
[4] James Stomber Consulting, San Francisco, CA USA
[5] Univ Michigan, Sch Med, Dept Med, Div Hematol Oncol, Ann Arbor, MI 48104 USA
[6] Univ Calif Los Angeles, Jonsson Comprehens Canc Ctr, Div Canc Prevent & Control Res, Los Angeles, CA 90024 USA
[7] Univ Calif Los Angeles, David Geffen Sch Med, Dept Family Med, Los Angeles, CA 90095 USA