WORLD JOURNAL OF GASTROENTEROLOGY, Volume 7, Issue 4,2001, Pages 579-582,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 7, Issue 4,2001, Pages 583-586,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 7, Issue 4,2001, Pages 476-481,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 7, Issue 4,2001, Pages 500-505,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 7, Issue 4,2001, Pages 569-571,