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Arrais FR, Degrazia F, Peres BU, Ferrazzo VA, Grehs RA, Valandro LF.Arrais FR, et al. Among authors: grehs ra.Gen Dent. 2014 May-Jun;62(3):e7-e11.Gen Dent. 2014.PMID: 24784526
Farret MM, Grehs RA, Ferreira RF, de Oliveira MH.Farret MM, et al. Among authors: grehs ra.Rev Assoc Paul Cir Dent. 1980 Mar-Apr;34(2):132-41.Rev Assoc Paul Cir Dent. 1980.PMID: 6933647Portuguese.No abstract available.