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Pan X, Wang Y, Zhang M, Pan W, Qi ZT, Cao GW.Pan X, et al. Among authors: cao gw.World J Gastroenterol. 2004 May 15;10(10):1409-14. doi: 10.3748/wjg.v10.i10.1409.World J Gastroenterol. 2004.PMID: 15133844Free PMC article.
Gao J, Cao GW, Qi ZT, Qiu XF, Wu ZD, Du P, Yang WG, Cui L.Gao J, et al. Among authors: cao gw.World J Gastroenterol. 1997 Mar 15;3(1):9-11. doi: 10.3748/wjg.v3.i1.9.World J Gastroenterol. 1997.PMID: 27006574Free PMC article.