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Hema D, Prasanna JS.Hema D, et al. Among authors: prasanna js.J Indian Soc Periodontol. 2021 Jan-Feb;25(1):6-10. doi: 10.4103/jisp.jisp_48_20. Epub 2021 Jan 7.J Indian Soc Periodontol. 2021.PMID: 33642734Free PMC article.Review.