WORLD JOURNAL OF GASTROENTEROLOGY, Volume 4, Issue 6,1998, Pages 533-535,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 4, Issue 6,1998, Pages 536-539,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 4, Issue 6,1998, Pages 464-466,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 4, Issue 6,1998, Pages 503-505,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 4, Issue 6,1998, Pages 550-552,