1. Yale School of Medicine, Section of Infectious Diseases, Department of Internal Medicine, New Haven, Connecticut
2. University of Michigan Health System, Division of Infectious Diseases, Department of Internal Medicine, Ann Arbor3Associate Editor, JAMA
3. Hebrew SeniorLife Institute for Aging Research, the Department of Medicine, Beth Israel Deaconess Medicine Center, Boston, Massachusetts5Department of Medicine, Harvard Medical School, Boston, Massachusetts