[1] Georgetown Univ, Sch Med, Inst Hlth Care Res & Policy, Dept Med, Washington, DC USA
[2] Georgetown Univ, Sch Med, Lombardi Canc Ctr, Washington, DC USA
[3] Jonsson Comprehens Canc Ctr, Dept Med, Los Angeles, CA 90034 USA
[4] Jonsson Comprehens Canc Ctr, Dept Hlth Serv Res, Los Angeles, CA 90034 USA
[5] Univ Calif Los Angeles, Sch Publ Hlth, Los Angeles, CA 90024 USA
[6] Univ Calif Los Angeles, Dept Med, Div Gen Internal Med & Hlth Serv Res, Los Angeles, CA 90024 USA
[7] RAND, Hlth Program, Los Angeles, CA USA