1. Department of Medicine, Sidney Kimmel Medical College at Thomas Jefferson University, Philadelphia, PA, USA
2. Iowa City VA Healthcare System, Iowa City, IA, USA
3. Department of Medicine, University of Iowa Carver College of Medicine, Iowa City, IA, USA
4. Department of Medicine, Duke University School of Medicine, Durham, NC, USA
5. Comprehensive Access and Delivery Research and Evaluation (CADRE) Center at the Iowa City VA Healthcare System and VA Quality Scholars Fellowship Program, Iowa City, IA, USA