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Dung TC, Dinh PN, Nam VS, Tan LM, Hang Nle K, Thanh le T, Mai le Q.Dung TC, et al.Western Pac Surveill Response J. 2014 Nov 18;5(4):21-6. doi: 10.5365/WPSAR.2014.5.2.006. eCollection 2014 Oct-Dec.Western Pac Surveill Response J. 2014.PMID: 25685601Free PMC article.