WORLD JOURNAL OF GASTROENTEROLOGY, Volume 10, Issue 18,2004, Pages 2657-2660,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 10, Issue 18,2004, Pages 2711-2714,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 10, Issue 18,2004, Pages 2762-2766,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 10, Issue 18,2004, Pages 2767-2768,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 10, Issue 18,2004, Pages 2619-2623,