WORLD JOURNAL OF GASTROENTEROLOGY, Volume 13, Issue 2,2007, Pages 219-223,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 13, Issue 2,2007, Pages 316-319,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 13, Issue 2,2007, Pages 224-227,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 13, Issue 2,2007, Pages 175-191,