WORLD JOURNAL OF GASTROENTEROLOGY, Volume 5, Issue 5,1999, Pages 440-442,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 5, Issue 5,1999, Pages 435-439,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 5, Issue 5,1999, Pages 388-390,397,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 5, Issue 5,1999, Pages 455-457,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 5, Issue 5,1999, Pages 430-431,