[1] Corporal Michael J Crescenz VA Med Ctr, Vet Adm Ctr Hlth Equ Res & Promot, Philadelphia, PA USA
[2] Univ Penn, Dept Family Med & Community Hlth, Perelman Sch Med, Philadelphia, PA 19104 USA
[3] Drexel Univ, Dept Epidemiol & Biostat, Dornsife Sch Publ Hlth, Philadelphia, PA 19104 USA
[4] Vet Adm Boston Healthcare Syst, Womens Hlth Sci Div, Natl Ctr PTSD, Boston, MA USA
[5] Boston Univ, Sch Med, Dept Psychiat, Boston, MA 02118 USA