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Crist JD, McEwen MM, Herrera AP, Kim SS, Pasvogel A, Hepworth JT.Crist JD, et al.Res Theory Nurs Pract. 2009;23(3):165-80. doi: 10.1891/1541-6577.23.3.165.Res Theory Nurs Pract. 2009.PMID: 19769211Free PMC article.