1. Center for Health Information and Communication, Department of Veterans Affairs, Veterans Health Administration, Health Services Research and Development Service CIN 13-416, Richard L. Roudebush VA Medical Center
2. Richard M. Fairbanks School of Public Health Indiana University
3. Center for Biomedical Informatics, Regenstrief Institute
4. School of Medicine, Indiana University
5. Center for Health Services Research, Regenstrief Institute