WORLD JOURNAL OF GASTROENTEROLOGY, Volume 15, Issue 15,2009, Pages 1914-1915,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 15, Issue 15,2009, Pages 1821-1828, doi:10.3748/wjg.15.1821
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 15, Issue 15,2009, Pages 1910-1913, doi:10.3748/wjg.15.1910
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 15, Issue 15,2009, Pages 1918-1920,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 15, Issue 15,2009, Pages 1904-1905, doi:10.3748/wjg.15.1904