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Cheung TT, Ng KK, Poon RT, Chan SC, Lo CM, Fan ST.Cheung TT, et al.World J Gastroenterol. 2010 Jan 28;16(4):526-30. doi: 10.3748/wjg.v16.i4.526.World J Gastroenterol. 2010.PMID: 20101784Free PMC article.
Cheung TT, Ng KK, Chok KS, Chan SC, Poon RT, Lo CM, Fan ST.Cheung TT, et al.World J Gastroenterol. 2010 Jun 28;16(24):3056-62. doi: 10.3748/wjg.v16.i24.3056.World J Gastroenterol. 2010.PMID: 20572310Free PMC article.