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Zekry D, Loures Valle BH, Graf C, Michel JP, Gold G, Krause KH, Herrmann FR.Zekry D, et al.J Am Med Dir Assoc. 2012 Mar;13(3):272-8. doi: 10.1016/j.jamda.2010.11.011. Epub 2011 Jan 8.J Am Med Dir Assoc. 2012.PMID: 21450226