WORLD JOURNAL OF GASTROENTEROLOGY, Volume 15, Issue 7,2009, Pages 879-881, doi:10.3748/wjg.15.879
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 15, Issue 7,2009, Pages 865-870, doi:10.3748/wjg.15.865
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 15, Issue 7,2009, Pages 849-852, doi:10.3748/wjg.15.849
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 15, Issue 7,2009, Pages 817-828, doi:10.3748/wjg.15.817
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 15, Issue 7,2009, Pages 885-887, doi:10.3748/wjg.15.888