WORLD JOURNAL OF GASTROENTEROLOGY, Volume 5, Issue 3,1999, Pages 252-262,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 5, Issue 3,1999, Pages 249-251,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 5, Issue 3,1999, Pages 225-227,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 5, Issue 3,1999, Pages 235-240,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 5, Issue 3,1999, Pages 199-208,