| http://www.w3.org/ns/prov#value | - Shardell Michelle M Department of Epidemiology and Public Health, University of Maryland School of Medicine, Baltimore, MD 21201, USA. - - 2013 Researchers often recruit proxy respondents, such as relatives or caregivers, for epidemiologic studies of older adults when study participants are unable to provide self-reports (eg, because of illness or cognitive impairment).
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