[1] Univ Calif Davis, Sch Med, Dept Pediat, Sacramento, CA 95817 USA
[2] Univ Rochester, Med Ctr, Ctr Commun & Dispar Res, Rochester, NY 14642 USA
[3] Univ Rochester, Med Ctr, Rochester Hlth Decis Making Grp, Rochester, NY 14642 USA
[4] Univ Rochester, Med Ctr, Dept Psychiat, Rochester, NY 14642 USA
[5] Univ Calif Davis, Sch Med, Ctr Healthcare Policy & Res, Sacramento, CA 95817 USA
[6] Univ Calif Davis, Sch Med, Dept Internal Med, Sacramento, CA 95817 USA
[7] Univ Calif Davis, Dept Sociol, Sacramento, CA 95817 USA
[8] Univ Rochester, Sch Med & Dent, Dept Family Med, Rochester, NY USA
[9] Univ Rochester, Sch Med & Dent, Dept Oncol, Rochester, NY USA