Mark W Friedberg1,2,3, Walid F Gellad4, Vinay Prasad5. 1. RAND Corporation, Boston, Massachusetts. 2. Division of General Internal Medicine, Brigham and Women's Hospital, Boston, Massachusetts. 3. Department of Medicine, Harvard Medical School, Boston, Massachusetts. 4. Division of General Internal Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania. 5. Division of Hematology/Oncology, Oregon Health & Science University, Portland.