[1] Univ Calif Los Angeles, Sch Nursing, Los Angeles, CA 90095 USA
[2] RAND Corp, Santa Monica, CA 90401 USA
[3] Univ Calif Los Angeles, David Geffen Sch Med, Dept Med Stat Core, Los Angeles, CA USA
[4] Univ Calif Irvine, Sue & Bill Gross Sch Nursing, Irvine, CA USA
[5] Univ North Carolina Chapel Hill, Sch Social Work, Chapel Hill, NC USA
[6] Univ Calif Los Angeles, Jonathan & Karin Fielding Sch Publ Hlth, Dept Community Hlth Sci, Los Angeles, CA USA
[7] Univ Calif Los Angeles, Fielding Sch Publ Hlth, Dept Hlth Policy & Management, Los Angeles, CA USA
[8] Univ Michigan, Sch Nursing, Dept Hlth Behav & Biol Sci, Ann Arbor, MI USA