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Shah MN, Heppard B, Medina-Walpole A, Clark NS, McCann R.Shah MN, et al.J Am Geriatr Soc. 2005 Jan;53(1):141-5. doi: 10.1111/j.1532-5415.2005.53024.x.J Am Geriatr Soc. 2005.PMID: 15667391