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Yang X, Liu F, Xu Z, Chen C, Li G, Wu X, Li J.Yang X, et al. Among authors: liu f.Dig Dis Sci. 2004 Sep;49(9):1493-8. doi: 10.1023/b:ddas.0000042254.35986.57.Dig Dis Sci. 2004.PMID: 15481327
Wang X, Liu F, Li X, Li J, Xu G.Wang X, et al. Among authors: liu f.Zhonghua Wai Ke Za Zhi. 2002 Sep;40(9):692-5.Zhonghua Wai Ke Za Zhi. 2002.PMID: 12411143Chinese.
Wang X, Liu FK, Li X, Li JS, Xu GX.Wang X, et al.World J Gastroenterol. 2002 Dec;8(6):1045-9. doi: 10.3748/wjg.v8.i6.1045.World J Gastroenterol. 2002.PMID: 12439922Free PMC article.
Wu X, Li N, Han J, Liu F, Xu Z, Li J.Wu X, et al. Among authors: liu f.Zhonghua Wai Ke Za Zhi. 2002 Nov;40(11):834-7.Zhonghua Wai Ke Za Zhi. 2002.PMID: 12487857Chinese.
Yao XQ, Liu FK, Qi XP, Wu B, Yin HL, Ma HH, Shi QL, Zhou XJ, Li JS.Yao XQ, et al.Zhonghua Wai Ke Za Zhi. 2004 Feb 7;42(3):145-8.Zhonghua Wai Ke Za Zhi. 2004.PMID: 15062058Chinese.
Yao XQ, Liu FK, Li JS, Qi XP, Wu B, Yin HL, Ma HH, Shi QL, Zhou XJ.Yao XQ, et al.World J Gastroenterol. 2004 May 1;10(9):1262-7. doi: 10.3748/wjg.v10.i9.1262.World J Gastroenterol. 2004.PMID: 15112339Free PMC article.
Chen C, Liu FK, Qi XP, Xu Z, Li GL, Li JS.Chen C, et al.Zhonghua Wai Ke Za Zhi. 2005 Jun 1;43(11):710-2.Zhonghua Wai Ke Za Zhi. 2005.PMID: 16008958Chinese.