[1] VA Boston Healthcare Syst, Natl Ctr PTSD, Boston, MA 02130 USA
[2] Boston Univ, Dept Psychol & Brain Sci, Boston, MA USA
[3] Boston Univ, Dept Psychiat, Chobanian & Avedisian Sch Med, Boston, MA USA
[4] Minneapolis VA Healthcare Syst, Minneapolis, MN USA
[5] Univ Minnesota, Dept Med, Minneapolis, MN USA