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Formiga F, Riera-Mestre A, Chivite D, Pujol R, Ferrer A, Lopéz-Soto A.Formiga F, et al.J Am Med Dir Assoc. 2009 Jul;10(6):444-6. doi: 10.1016/j.jamda.2009.03.013.J Am Med Dir Assoc. 2009.PMID: 19560730No abstract available.