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Cammer A, Morgan D, Stewart N, McGilton K, Rycroft-Malone J, Dopson S, Estabrooks C.Cammer A, et al.Gerontologist. 2014 Dec;54(6):1013-23. doi: 10.1093/geront/gnt068. Epub 2013 Jul 15.Gerontologist. 2014.PMID: 23856027