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Chastek BJ, Oleen-Burkey M, Lopez-Bresnahan MV.Chastek BJ, et al.J Med Econ. 2010;13(4):618-25. doi: 10.3111/13696998.2010.523670. Epub 2010 Oct 1.J Med Econ. 2010.PMID: 20883151Free article.
Williams SA, Greenspan SL, Bancroft T, Chastek BJ, Wang Y, Weiss RJ, Pyrih N, Nichols H, Cauley JA.Williams SA, et al.PLoS One. 2021 Sep 27;16(9):e0257246. doi: 10.1371/journal.pone.0257246. eCollection 2021.PLoS One. 2021.PMID: 34570793Free PMC article.