1. Center of Excellence, VA Connecticut Healthcare System, Newington, CT, USA
2. Center for Health Services Research in Primary Care, Durham VAMC, Durham, NC, USA
3. Duke University, Durham, NC, USA
4. VA Central Western Massachusetts, Leeds, MA, USA
5. Department of Quantitative Health Science, University of Massachusetts Medical School, Worcester, MA, USA
6. VA Greater Los Angeles HSR&D Center for the Study of Healthcare Innovation, Implementation & Policy, Sepulveda, CA, USA
7. UCLA Fielding School of Public Health, Los Angeles, CA, USA
8. VA Connecticut Healthcare System, Newington, CT, USA.
9. Division of General Internal Medicine, University of Connecticut, Farmington, CT, USA