[1] VA Boston Healthcare Syst, Natl Ctr PTSD, Behav Sci Div, Boston, MA USA
[2] Providence VA Med Ctr, Vulnerable Vet Populat Res Grp, Providence, RI USA
[3] Brown Univ, Warren Alpert Med Sch, Dept Psychiat, Providence, RI 02912 USA
[4] VA Boston Healthcare Syst, Ctr Org Leadership & Management Res, Boston, MA USA
[5] Boston Univ, Dept Hlth Policy & Management, Boston, MA 02215 USA
[6] US Army Res Inst Environm Med, Mil Performance Div, Natick, MA USA
[7] VA Boston Healthcare Syst, Res Serv, Boston, MA USA
[8] Boston Univ, Sch Publ Hlth, Dept Environm Hlth, Boston, MA USA
[9] Boston Univ, Sch Med, Dept Psychiat, Boston, MA 02118 USA