1. Indiana University Purdue University, Department of Economics, Indianapolis, IN, USA
2. James Comprehensive Cancer Center, The Ohio State University, Columbus, OH, USA
3. The William Tierney Center for Health Services Research, Regenstrief Institute Inc, Indianapolis, IN, USA
4. Indiana University School of Nursing, Indiana University Melvin and Bren Simon Cancer Comprehensive Center, Indianapolis, IN, USA
5. Department of Epidemiology & Biostatistics, Indiana University School of Public Health-Bloomington, Bloomington, IN, USA
6. Indianapolis VA HSR&D Center for Health Information and Communication, Roudebush VA, Indianapolis, IN, USA
7. Division of General Internal Medicine & Geriatrics, Indiana University School of Medicine, Indianapolis, IN, USA
8. Center for Health Services Research, Regenstrief Institute, Indianapolis, IN, USA.