[1] Edith Nourse Rogers Mem Vet Adm Hosp, CHQOER, Bedford, MA 01730 USA
[2] Boston Univ, Sch Publ Hlth, Dept Hlth Policy & Management, Boston, MA USA
[3] Dept Vet Affairs, Natl Ctr PTSD, Palo Alto, CA USA
[4] VA Ctr Hlth Care Evaluat, Menlo Pk, CA USA
[5] VA Greater Los Angeles Hlth Care Syst, HIV Hepatitis Qual Enhancement Res Initiat, Los Angeles, CA USA
[6] Univ Calif Los Angeles, David Geffen Sch Med, Los Angeles, CA 90095 USA
[7] VA New England Hlth Care Syst, HIV Hepatitis Qual Enhancement Res Initiat, Bedford, MA USA
[8] Boston Univ, Sch Med, Boston, MA 02118 USA