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van Steenbergen TJ, Bosch-Tijhof CJ, Petit MD, Van der Velden U.van Steenbergen TJ, et al. Among authors: petit md.J Periodontal Res. 1997 May;32(4):345-50. doi: 10.1111/j.1600-0765.1997.tb00543.x.J Periodontal Res. 1997.PMID: 9210087
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