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Berger, S. B.; Soares, L. E. S.; Martin, A. A.; Ambrosano, G. M. B.; Tabchoury, C. P. M.; Giannini, M. Effects of Various Hydrogen Peroxide Bleaching Concentrations and Number of Applications on Ename. Braz. J. Oral Sci. 2015, 13, 22-27.