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Bonell CP, Hargreaves J, Cousens S, Ross D, Hayes R, Petticrew M, Kirkwood BR.Bonell CP, et al.J Epidemiol Community Health. 2011 Jul;65(7):582-7. doi: 10.1136/jech.2008.082602. Epub 2009 Feb 12.J Epidemiol Community Health. 2011.PMID: 19213758Review.
Cori A, Ayles H, Beyers N, Schaap A, Floyd S, Sabapathy K, Eaton JW, Hauck K, Smith P, Griffith S, Moore A, Donnell D, Vermund SH, Fidler S, Hayes R, Fraser C; HPTN 071 PopART Study Team.Cori A, et al.PLoS One. 2014 Jan 15;9(1):e84511. doi: 10.1371/journal.pone.0084511. eCollection 2014.PLoS One. 2014.PMID: 24454728Free PMC article.Clinical Trial.