1. Quantitative Health Sciences, Division of Health Informatics and Implementation Science, University of Massachusetts Medical School, Worcester, USA
2. VA E-health Quality Enhancement Research Initiative, Bedford VAMC, Massachusetts, USA
3. Center for Healthcare Organization and Implementation Research, Bedford VAMC, Massachusetts, USA
4. Department of Medicine, Division of Infectious Diseases, University of Alabama at Birmingham, USA
5. Department of Medicine, Division of General Internal Medicine, University of Alabama at Birmingham, USA
6. Department of Electrical and Computer Engineering, Worcester Polytechnic Institute, Massachusetts, USA
7. Department of Medicine, Geriatrics Division, University of California, San Francisco, USA
8. San Francisco VAMC, San Francisco, CA, USA