WORLD JOURNAL OF GASTROENTEROLOGY, Volume 13, Issue 37,2007, Pages 4947-4954,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 13, Issue 37,2007, Pages 4955-4959,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 13, Issue 37,2007, Pages 5021-5024,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 13, Issue 37,2007, Pages 4931-4937,