CHINESE JOURNAL OF GASTROINTESTINAL SURGERY, Volume 9, Issue 4,2006, Pages 301-304, doi:10.3760/cma.j.issn.1671-0274.2006.04.008
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CHINESE JOURNAL OF GASTROINTESTINAL SURGERY, Volume 9, Issue 4,2006, Pages 297-300, doi:10.3760/cma.j.issn.1671-0274.2006.04.007