WORLD JOURNAL OF GASTROENTEROLOGY, Volume 4, Issue 5,1998, Pages 418-420,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 4, Issue 5,1998, Pages 459-460,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 4, Issue 5,1998, Pages 397-403,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 4, Issue 5,1998, Pages 404-408,