WORLD JOURNAL OF GASTROENTEROLOGY, Volume 8, Issue 1,2002, Pages 87-90,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 8, Issue 1,2002, Pages 21-25,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 8, Issue 1,2002, Pages 180-182,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 8, Issue 1,2002, Pages 139-143,