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Chang WL, Lin FC, Yen CJ, Cheng H, Lai WW, Yang HB, Sheu BS.Chang WL, et al. Among authors: sheu bs.Dis Esophagus. 2011 Nov;24(8):590-5. doi: 10.1111/j.1442-2050.2011.01195.x. Epub 2011 May 3.Dis Esophagus. 2011.PMID: 21539673Clinical Trial.