Surf these sites: Merck Manual of Geriatrics: 32. Aging Processes -- The large number of theories on aging can be attributed in part to the newness of biologic gerontology, a discipline that has received intensive research support only in the past 15 yr. The major current theories of aging can be divided into two types: those that suppose aging events occur randomly and accumulate with time (stochastic theories) and those that suppose aging is predetermined (nonstochastic theories). Open Directory - Search Results -- Automatically search the Open Directory for "Preventive Medicine" categories and links.
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