WORLD JOURNAL OF GASTROENTEROLOGY, Volume 7, Issue 5,2001, Pages 602-611,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 7, Issue 5,2001, Pages 713-717,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 7, Issue 5,2001, Pages 622-626,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 7, Issue 5,2001, Pages 698-701,