WORLD JOURNAL OF GASTROENTEROLOGY, Volume 8, Issue 2,2002, Pages 328-332,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 8, Issue 2,2002, Pages 363-366,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 8, Issue 2,2002, Pages 305-307,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 8, Issue 2,2002, Pages 375-378,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 8, Issue 2,2002, Pages 276-281,