1 Division of General Internal Medicine and Geriatrics, Department of Medicine, Indiana University School of Medicine, Indianapolis, USA. kkroenke@regenstrief.org.
2 Regenstrief Institute, Inc., Room 221, 1101 W. 10th Street, Indianapolis, IN, 46202, USA. kkroenke@regenstrief.org.
3 Division of General Internal Medicine and Geriatrics, Department of Medicine, Indiana University School of Medicine, Indianapolis, USA.
4 Regenstrief Institute, Inc., Room 221, 1101 W. 10th Street, Indianapolis, IN, 46202, USA.
5 VA HSR&D Center for Health Information and Communication, Roudebush VAMC, Indianapolis, USA.