[1] Minneapolis VA Hlth Care Syst, VA HSR&D Ctr Care Delivery & Outcomes Res, Minneapolis, MN USA
[2] Univ Minnesota, Sch Med, Dept Med, Minneapolis, MN 55455 USA
[3] VA Salt Lake City Healthcare Syst, VA Informat & Comp Infrastructure VINCI, Salt Lake City, UT USA
[4] UCLA Fielding Sch Publ Hlth, Dept Hlth Policy & Management, Los Angeles, CA USA
[5] UCLA Geffen Sch Med, Dept Med, Los Angeles, CA USA