Open Access Highly Accessed Research article

Cognitive health among older adults in the United States and in England

Kenneth M Langa*, David J Llewellyn, Iain A Lang, David R Weir, Robert B Wallace, Mohammed U Kabeto and Felicia A Huppert

BMC Geriatrics 2009, 9:23  doi:10.1186/1471-2318-9-23

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