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Ayala GX, Elder JP.Ayala GX, et al. Among authors: elder jp.J Public Health Dent. 2011 Winter;71 Suppl 1(0 1):S69-79. doi: 10.1111/j.1752-7325.2011.00241.x.J Public Health Dent. 2011.PMID: 21656958Free PMC article.