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Chinkhumba J, De Allegri M, Muula AS, Robberstad B.Chinkhumba J, et al. Among authors: muula as.BMC Public Health. 2014 Sep 28;14:1014. doi: 10.1186/1471-2458-14-1014.BMC Public Health. 2014.PMID: 25263746Free PMC article.