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Viergever RF, Karam G, Reis A, Ghersi D.Viergever RF, et al.PLoS One. 2014 Jan 10;9(1):e84727. doi: 10.1371/journal.pone.0084727. eCollection 2014.PLoS One. 2014.PMID: 24427293Free PMC article.
Viergever RF, Terry RF, Karam G.Viergever RF, et al.Bull World Health Organ. 2013 Jun 1;91(6):416-425C. doi: 10.2471/BLT.12.114454. Epub 2013 Apr 3.Bull World Health Organ. 2013.PMID: 24052678Free PMC article.