WORLD JOURNAL OF GASTROENTEROLOGY, Volume 15, Issue 11,2009, Pages 1359-1366, doi:10.3748/wjg.15.1359
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 15, Issue 11,2009, Pages 1381-1387, doi:10.3748/wjg.15.1381
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 15, Issue 11,2009, Pages 1406-1408,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 15, Issue 11,2009, Pages 1388-1390, doi:10.3748/wjg.15.1388
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 15, Issue 11,2009, Pages 1353-1358, doi:10.3748/wjg.15.1353