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This is the peer reviewed version of the following article: Nibali, L., Sun, C., Akcalı, A., Meng, X., Tu, Y.-K. and Donos, N. (2016), A retrospective study on periodontal disease progression in private practice. J Clin Periodontol. doi:10.1111/jcpe.12653, which has been published in final form at http://dx.doi.org/10.1111/jcpe.12653. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.
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