[1] Univ Calif Los Angeles, Dept Med, David Geffen Sch Med, Los Angeles, CA 90024 USA
[2] Univ Michigan, Ann Arbor, MI 48109 USA
[3] Ann Arbor Vet Adm, Ctr Med, Ann Arbor, MI USA
[4] Univ N Carolina, Dept Hlth Policy & Adm, Chapel Hill, NC USA
[5] Ctr Dis Control & Prevent, Atlanta, GA USA
[6] Kaiser Permanente, Div Res, Oakland, CA USA
[7] Univ Alabama Birmingham, Dept Med, Div Prevent Med, Birmingham, AL 35294 USA
[8] Ctr Continuing & Outreach Educ, Pacific Hlth Res Inst, Honolulu, HI USA