[1] US Dept Vet Affairs, Vet Emergency Management Evaluat Ctr VEMEC, 16111 Plummer St MS-152, North Hills, CA 91343 USA
[2] Oregon Hlth & Sci Univ, Dept Family Med, 3181 SW Sam Jackson Pk Rd, Portland, OR 97239 USA
[3] US Dept Vet Affairs, Rocky Mt Reg VA Med Ctr, Denver Seattle Ctr Innovat, 1700 North Wheeling St, Aurora, CO 80045 USA
[4] Univ Memphis, Div Hlth Syst Management & Policy, Sch Publ Hlth, 3720 Alumni Ave, Memphis, TN 38152 USA