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Houchens RL, Elixhauser A, Romano PS.Houchens RL, et al.Jt Comm J Qual Patient Saf. 2008 Mar;34(3):154-63. doi: 10.1016/s1553-7250(08)34018-5.Jt Comm J Qual Patient Saf. 2008.PMID: 18419045