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Chen Q, Shao Z, Liu K, Zhou X, Wang L, Jiang E, Luo T, Shang Z.Chen Q, et al. Among authors: shang z.BMC Oral Health. 2021 May 3;21(1):228. doi: 10.1186/s12903-021-01580-6.BMC Oral Health. 2021.PMID: 33941164Free PMC article.
Shang ZJ, Liu K, Chen XM.Shang ZJ, et al.Zhonghua Kou Qiang Yi Xue Za Zhi. 2008 Oct;43(10):592-6.Zhonghua Kou Qiang Yi Xue Za Zhi. 2008.PMID: 19087620Chinese.