Gerontology is the study of aging and older adults. The science of geriatrics could be a multidisciplinary field and has evolved as longevity has improved. Researchers during this field are numerous and are trained in areas like physiology, scientific discipline, psychology, public health, and policy. Geriatrics encompasses biogerontology, sociogerontology, psychogerontology, geroscience, sociology and environmental geriatrics.
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