1. Department of Medical Informatics and Clinical Epidemiology, Oregon Health and Science University, Portland, Oregon, United States
2. Center for Health Informatics and Evidence Synthesis, RTI International, Chicago, Illinois, United States
3. Department of Medicine, Oregon Health and Science University, Portland, Oregon, United States
4. Division of General Internal Medicine and Primary Care, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, United States
5. Department of Medicine, Harvard Medical School, Boston, Massachusetts, United States