1. VA Office of Rural Health (ORH), Veterans Rural Health Resource Center-Iowa City, Iowa City VA Health Care System , Iowa City, IA 52246, USA
2. Center for Access & Delivery Research and Evaluation (CADRE), Iowa City VA Health Care System , Iowa City, IA 52246, USA
3. Department of Anesthesia, University of Iowa Carver College of Medicine , Iowa City, IA 52242, USA
4. Pain Research, Informatics, Multimorbidities, and Education (PRIME) Center, VA Connecticut Healthcare System , West Haven, CT 06516, USA
5. Department of Psychiatry, Yale School of Medicine , New Haven, CT 06511, USA
6. Department of Epidemiology, University of Iowa College of Public Health , Iowa City, IA 52242, USA