1. Department of Health Care Policy, Harvard Medical School, Boston, Massachusetts
2. Division of Primary Care and General Internal Medicine, Department of Medicine, Beth Israel Deaconess Medical Center, Boston, Massachusetts
3. Division of General Internal Medicine, Department of Medicine, Brigham and Women’s Hospital, Boston, Massachusetts
4. Department of Biostatistics, Harvard School of Public Health, Boston, Massachusetts
5. Yale Institute of Network Sciences, Yale University, New Haven, Connecticut
6. The Dartmouth Institute for Health Policy and Clinical Practice, Geisel School of Medicine at Dartmouth, Lebanon, New Hampshire