WORLD JOURNAL OF GASTROENTEROLOGY, Volume 13, Issue 20,2007, Pages 2896,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 13, Issue 20,2007, Pages 2862-2866,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 13, Issue 20,2007, Pages 2819-2825,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 13, Issue 20,2007, Pages 2895,