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Pugh MJ, Hanlon JT, Wang CP, Semla T, Burk M, Amuan ME, Lowery A, Good CB, Berlowitz DR.Pugh MJ, et al.J Am Geriatr Soc. 2011 Oct;59(10):1891-8. doi: 10.1111/j.1532-5415.2011.03559.x. Epub 2011 Aug 30.J Am Geriatr Soc. 2011.PMID: 21883108Free PMC article.