[1] Univ Calif San Francisco, Dept Epidemiol & Biostat, San Francisco, CA 94143 USA
[2] Stanford Univ, Stanford Canc Inst, Stanford, CA 94305 USA
[3] Univ So Calif, Div Epidemiol, Prevent Med, Los Angeles, CA USA
[4] Univ Calif Davis, Dept Pathol & Lab Med, Sacramento, CA 95817 USA
[5] Univ Calif Davis, Inst Populat Hlth Improvement, Sacramento, CA 95817 USA
[6] Emory Univ, Winship Canc Inst, Rollins Sch Publ Hlth, Dept Hlth Policy & Management, Atlanta, GA 30322 USA
[7] WellPoint Inc, Oncol & Care Management, Thousand Oaks, CA USA
[8] Hooper Lundy & Bookman PC, San Francisco, CA USA
[9] Consumer Reports Hlth, Yonkers, NY USA
[10] Harvard Univ, Sch Med, Dana Farber Canc Inst, Dept Med, Boston, MA 02115 USA