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Haverkamp D, Perdue DG, Espey D, Cobb N.Haverkamp D, et al. Among authors: perdue dg.J Health Care Poor Underserved. 2011 Feb;22(1):243-57. doi: 10.1353/hpu.2011.0014.J Health Care Poor Underserved. 2011.PMID: 21317519