MD, MPH. Former Director, Division of Geriatric Medicine and Gerontology, and Center on Aging and Health, The Johns Hopkins Medical Institutions. Dean and DeLamar Prof. of Public Health, Mailman School of Public Health, Columbia Univ. Prof. of Medicine, Columbia's College of Physicians & Surgeons. Senior VP, Columbia Univ. Medical Center. Renowned scientist in epidemiology, gerontology and geriatrics. Has led scientific work to define frailty and its causes and potential for prevention as keys to optimizing health for older adults. Co-Designer and Co-Founder, Experience Corps. Member: National Academy of Sciences' Institute of Medicine; Assoc. of American Physicians; MacArthur Network on an Aging Society; Global Agenda Council on Ageing and Global Task Force on Social Protection, World Economic Forum. Awards.