WORLD JOURNAL OF GASTROENTEROLOGY, Volume 8, Issue 4,2002, Pages 674-678,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 8, Issue 4,2002, Pages 663-667,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 8, Issue 4,2002, Pages 679-685,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 8, Issue 4,2002, Pages 638-643,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 8, Issue 4,2002, Pages 728-733,