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Hersh EV, Houpt MI, Cooper SA, Feldman RS, Wolff MS, Levin LM.Hersh EV, et al. Among authors: cooper sa.J Am Dent Assoc. 1996 Nov;127(11):1626-34; quiz 1665-6. doi: 10.14219/jada.archive.1996.0098.J Am Dent Assoc. 1996.PMID: 8952239Free article.Clinical Trial.
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