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Ayres JR, Paiva V, França I Jr, Gravato N, Lacerda R, Della Negra M, Marques HH, Galano E, Lecussan P, Segurado AC, Silva MH.Ayres JR, et al.Am J Public Health. 2006 Jun;96(6):1001-6. doi: 10.2105/AJPH.2004.060905. Epub 2006 Jan 31.Am J Public Health. 2006.PMID: 16449593Free PMC article.