WORLD JOURNAL OF GASTROENTEROLOGY, Volume 13, Issue 15,2007, Pages 2255-2257,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 13, Issue 15,2007, Pages 2145-2149,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 13, Issue 15,2007, Pages 2261-2262,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 13, Issue 15,2007, Pages 2247-2249,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 13, Issue 15,2007, Pages 2214-2217,