WORLD JOURNAL OF GASTROENTEROLOGY, Volume 13, Issue 40,2007, Pages 5331-5335,
NATIONAL MEDICAL JOURNAL OF CHINA, Volume 87, Issue 40,2007, Pages 2852-2855, doi:10.3760/j.issn:0376-2491.2007.40.013
JOURNAL OF CLINICAL REHABILITATIVE TISSUE ENGINEERING RESEARCH, Volume 11, Issue 40,2007, Pages 8178-8180, doi:10.3321/j.issn:1673-8225.2007.40.046
JOURNAL OF CLINICAL REHABILITATIVE TISSUE ENGINEERING RESEARCH, Volume 11, Issue 40,2007, Pages 8169-8172, doi:10.3321/j.issn:1673-8225.2007.40.044