NATIONAL MEDICAL JOURNAL OF CHINA, Volume 87, Issue 44,2007, Pages 3147, doi:10.3760/j.issn:0376-2491.2007.44.023
JOURNAL OF CLINICAL REHABILITATIVE TISSUE ENGINEERING RESEARCH, Volume 11, Issue 44,2007, Pages 8969-8971, doi:10.3321/j.issn:1673-8225.2007.44.049
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WORLD JOURNAL OF GASTROENTEROLOGY, Volume 13, Issue 44,2007, Pages 5902-5910,
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