SHANDONG MEDICAL JOURNAL, Volume 50, Issue 46,2010, Pages 79-80, doi:10.3969/j.issn.1002-266X.2010.46.051
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 16, Issue 46,2010, Pages 5869-5873, doi:10.3748/wjg.v16.i46.5869
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