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MacKenzie TA, Tosteson TD, Morden NE, Stukel TA, O'Malley AJ.MacKenzie TA, et al.Health Serv Outcomes Res Methodol. 2014 Jun;14(1-2):54-68. doi: 10.1007/s10742-014-0117-x.Health Serv Outcomes Res Methodol. 2014.PMID: 25506259Free PMC article.
Chen G, Lewis VA, Gottlieb D, O'Malley AJ.Chen G, et al.Health Serv Outcomes Res Methodol. 2021 Mar;21(1):54-68. doi: 10.1007/s10742-020-00230-8. Epub 2021 Jan 4.Health Serv Outcomes Res Methodol. 2021.PMID: 33658885Free PMC article.