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Koopmans RT, Lavrijsen JC, Hoek F.Koopmans RT, et al.J Am Med Dir Assoc. 2013 Nov;14(11):781-3. doi: 10.1016/j.jamda.2013.08.004. Epub 2013 Sep 8.J Am Med Dir Assoc. 2013.PMID: 24021540No abstract available.