1. US Department of Veterans Affairs National Center for Posttraumatic Stress Disorder, Minneapolis Veterans Affairs Healthcare System, Minneapolis, Minnesota2Center for Chronic Disease Outcomes Research, Minneapolis Veterans Affairs Healthcare System, Minne
2. US Department of Veterans Affairs Evidence-based Synthesis Center, Durham Veterans Affairs Medical Center, Durham, North Carolina 5Division of General Internal Medicine, Duke University Medical School, Durham, North Carolina
3. Center for Chronic Disease Outcomes Research, Minneapolis Veterans Affairs Healthcare System, Minneapolis, Minnesota3University of Minnesota Medical School, Minneapolis
4. Mid-Atlantic Mental Illness, Research, Education, and Clinical Center, Durham Veterans Affairs Medical Center, Durham, North Carolina 7Department of Psychiatry and Behavioral Sciences, Duke University Medical Center, Durham, North Carolina
5. Department of Psychiatry and Behavioral Sciences, Duke University Medical Center, Durham, North Carolina8Department of Mental Health,Durham Veterans Affairs Medical Center, Durham, North Carolina
6. Department of Epidemiology and Preventive Medicine, School of Public Health, Sackler Faculty of Medicine, Tel Aviv University, Israel 10Gertner Institute for Health Policy and Epidemiology,Sheba Medical Center, Tel Hashomer, Israel