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Visser M, Finestone M, Sikkema K, Boeving-Allen A, Ferreira R, Eloff I, Forsyth B.Visser M, et al.Eval Program Plann. 2012 Nov;35(4):491-500. doi: 10.1016/j.evalprogplan.2012.04.001. Epub 2012 Apr 6.Eval Program Plann. 2012.PMID: 22542951Free PMC article.
Kotzé M, Visser M, Makin J, Sikkema K, Forsyth B.Kotzé M, et al.AIDS Care. 2013;25(6):695-701. doi: 10.1080/09540121.2013.772277. Epub 2013 Feb 26.AIDS Care. 2013.PMID: 23442202