1. Center for Comprehensive Access & Delivery Research and Evaluation, Iowa City Veteran's Affairs Healthcare System, Iowa City, Iowa.
2. Rural Health Resource Center—Central Region, Iowa City Veteran's Affairs Healthcare System, Iowa City, Iowa.
3. Sinclair School of Nursing, University of Missouri, Columbia, Missouri.
4. Department of Internal Medicine, University of Iowa Roy and Lucille Carver College of Medicine, Iowa City, Iowa.