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Ayles H, Schaap A, Nota A, Sismanidis C, Tembwe R, De Haas P, Muyoyeta M, Beyers N; Peter Godfrey-Faussett for the ZAMSTAR Study Team.Ayles H, et al.PLoS One. 2009;4(5):e5602. doi: 10.1371/journal.pone.0005602. Epub 2009 May 19.PLoS One. 2009.PMID: 19440346Free PMC article.