[1] Univ Southern Calif, Suzanne Dworak Peck Sch Social Work, Los Angeles, CA 90007 USA
[2] Univ Southern Calif, Edward R Roybal Inst Aging, Los Angeles, CA USA
[3] Ewha Womans Univ, Dept Social Welf, Seoul, South Korea
[4] Univ Southern Calif, Viterbi Sch Engn, Daniel J Epstein Dept Ind & Syst Engn, Los Angeles, CA USA
[5] Kaiser Permanente Bernard J Tyson Sch Med, Dept Hlth Syst Sci, Pasadena, CA USA
[6] Univ Texas Hlth Sci Ctr Houston, Sch Publ Hlth, Houston, TX USA
[7] Univ Calif San Diego, Herbert Wertheim Sch Publ Hlth, San Diego, CA USA