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Okoli U, Oduenyi C, Onwudinjo N, Ejeckam C, Adegoke F, Holmlund M, Dias PR, Crawford E.Okoli U, et al. Among authors: ejeckam c.Health Serv Res Manag Epidemiol. 2015 Oct 7;2:2333392815609143. doi: 10.1177/2333392815609143. eCollection 2015 Jan-Dec.Health Serv Res Manag Epidemiol. 2015.PMID: 28462267Free PMC article.