WORLD JOURNAL OF GASTROENTEROLOGY, Volume 10, Issue 6,2004, Pages 919-921,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 10, Issue 6,2004, Pages 852-855,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 10, Issue 6,2004, Pages 776-782,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 10, Issue 6,2004, Pages 913-914,