1 Center for Health Services Research in Primary Care, Durham Veterans Affairs Medical Center, Durham, NC, USA. karen.goldstein@duke.edu.
2 Department of Medicine, Division of General Internal Medicine, Duke University Medical Center, 411 W. Chapel Hill Street; Suite 500, Durham, NC, 27701, USA. karen.goldstein@duke.edu.
3 Center for Health Services Research in Primary Care, Durham Veterans Affairs Medical Center, Durham, NC, USA.
4 Department of Medicine, Division of General Internal Medicine, Duke University Medical Center, 411 W. Chapel Hill Street; Suite 500, Durham, NC, 27701, USA.
5 Duke University School of Nursing, Durham, NC, USA.
6 Duke Clinical Research Institute, Durham, NC, USA.
7 Duke University Medical Center Library, Durham, NC, USA.
8 Department of Physical Therapy, Duke University Medical Center, Durham, NC, USA.
9 Department of Medicine, Duke University Medical Center, Durham, NC, USA.