[1] VA Boston Healthcare Syst, Natl Ctr PTSD, Boston, MA USA
[2] Richard L Roudebush VA Med Ctr, HSR&D Ctr Hlth Informat & Commun, Indianapolis, IN USA
[3] Regenstrief Inst Hlth Care, Indianapolis, IN USA
[4] Indiana Univ Sch Med, Dept Gen Internal Med & Geriatr, Indianapolis, IN USA
[5] Northwestern Univ, Feinberg Sch Med, Div Gen Internal Med, Chicago, IL USA
[6] Minneapolis VA Healthcare Syst, Ctr Care Delivery & Outcomes Res, Minneapolis, MN USA
[7] Univ Minnesota, Dept Med, Minneapolis, MN USA
[8] Richard L Roudebush VA Med Ctr, Dept Vet Affairs, 1481 West 10th St, Indianapolis, IN 46202 USA