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Journal of the American Geriatrics Society > 60 > 2 > 338 - 343
European Journal of Ageing > 2007 > 4 > 2 > 83-91
Journal of the American Geriatrics Society > 60 > 2 > 338 - 343
European Journal of Ageing > 2007 > 4 > 2 > 83-91