1. Center for Access & Delivery Research and Evaluation (CADRE), Iowa City VA Health Care System, 601 Highway 6 West, Building 42, Iowa City, IA 52246, USA
2. VA Office of Rural Health (ORH), Veterans Rural Health Resource Center-Iowa City (VRHRC-IC), Iowa City VA Health Care System, 601 Highway 6 West, Iowa City, IA 52246, USA
3. Department of Anesthesia, University of Iowa Carver College of Medicine, 200 Hawkins Drive, Iowa City, IA 52242, USA
4. Department of Internal Medicine, University of Iowa Carver College of Medicine, 200 Hawkins Drive, Iowa City, IA 52242, USA
5. Department of Psychological and Brain Sciences, University of Iowa College of Liberal Arts and Sciences, 340 Iowa Ave, Iowa City, IA 52246, USA
6. National Center for PTSD, 215 North Main Street, White River Junction, VT 05009, USA
7. Department of Psychiatry, University of California San Diego School of Medicine, 9500 Gilman Drive, La Jolla, CA 92093, USA
8. Department of Biostatistics, University of Iowa College of Public Health, 145 N Riverside Drive, Iowa City, IA 52242, USA