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Cho YI, Kim HY.Cho YI, et al. Among authors: kim hy.J Periodontal Implant Sci. 2015 Feb;45(1):2-7. doi: 10.5051/jpis.2015.45.1.2. Epub 2015 Feb 25.J Periodontal Implant Sci. 2015.PMID: 25722920Free PMC article.Review.
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