WORLD CHINESE JOURNAL OF DIGESTOLOGY, Volume 7, Issue 12,1999, Pages 1073, doi:10.3969/j.issn.1009-3079.1999.12.056
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WORLD CHINESE JOURNAL OF DIGESTOLOGY, Volume 7, Issue 12,1999, Pages 1035-1037, doi:10.3969/j.issn.1009-3079.1999.12.008
WORLD CHINESE JOURNAL OF DIGESTOLOGY, Volume 7, Issue 12,1999, Pages 1080, doi:10.3969/j.issn.1009-3079.1999.12.049