WORLD JOURNAL OF GASTROENTEROLOGY, Volume 15, Issue 18,2009, Pages 2190-2203, doi:10.3748/wjg.15.2190
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 15, Issue 18,2009, Pages 2277-2279, doi:10.3748/wjg.15.2277
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 15, Issue 18,2009, Pages 2290-2292, doi:10.3748/wjg.15.2290
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 15, Issue 18,2009, Pages 2302-2304,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 15, Issue 18,2009, Pages 2214-2219, doi:10.3748/wjg.15.2214