WORLD JOURNAL OF GASTROENTEROLOGY, Volume 13, Issue 17,2007, Pages 2490-2495,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 13, Issue 17,2007, Pages 2416-2426,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 13, Issue 17,2007, Pages 2436-2441,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 13, Issue 17,2007, Pages 2520-2522,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 13, Issue 17,2007, Pages 2442-2445,