WORLD JOURNAL OF GASTROENTEROLOGY, Volume 11, Issue 21,2005, Pages 3227-3233,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 11, Issue 21,2005, Pages 3255-3259,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 11, Issue 21,2005, Pages 3260-3263,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 11, Issue 21,2005, Pages 3315-3318,