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Cheng R, Wu Z, Li M, Shao M, Hu T.Cheng R, et al.Int J Oral Sci. 2020 Jan 2;12(1):2. doi: 10.1038/s41368-019-0068-8.Int J Oral Sci. 2020.PMID: 31900383Free PMC article.Review.
Wang FM, Hu T, Cheng R, Tan H, Zhou XD.Wang FM, et al. Among authors: cheng r.Int Endod J. 2008 Oct;41(10):856-62. doi: 10.1111/j.1365-2591.2008.01437.x.Int Endod J. 2008.PMID: 18822012
Cheng R, Zhou XD, Liu Z, Yang H, Gao QH, Hu T.Cheng R, et al.Int Endod J. 2009 Mar;42(3):220-6. doi: 10.1111/j.1365-2591.2008.01505.x.Int Endod J. 2009.PMID: 19228212
Yang H, Zhu YT, Cheng R, Shao MY, Fu ZS, Cheng L, Wang FM, Hu T.Yang H, et al. Among authors: cheng l, cheng r.Braz J Med Biol Res. 2010 Nov;43(11):1027-33. doi: 10.1590/s0100-879x2010007500102. Epub 2010 Oct 8.Braz J Med Biol Res. 2010.PMID: 20945038Free article.
Cheng R, Shao MY, Yang H, Cheng L, Wang FM, Zhou XD, Hu T.Cheng R, et al. Among authors: cheng l.Int Endod J. 2011 Jan;44(1):2-8. doi: 10.1111/j.1365-2591.2010.01773.x. Epub 2010 Nov 15.Int Endod J. 2011.PMID: 21073482