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Campbell RJ, Nolfi DA.Campbell RJ, et al. Among authors: nolfi da.J Med Internet Res. 2005 Jun 30;7(2):e19. doi: 10.2196/jmir.7.2.e19.J Med Internet Res. 2005.PMID: 15998610Free PMC article.
Rapchak ME, Nolfi DA, Turk MT, Marra L, O'Neil CK.Rapchak ME, et al. Among authors: nolfi da.J Med Libr Assoc. 2018 Oct;106(4):464-470. doi: 10.5195/jmla.2018.455. Epub 2018 Oct 1.J Med Libr Assoc. 2018.PMID: 30271287Free PMC article.