WORLD JOURNAL OF GASTROENTEROLOGY, Volume 13, Issue 18,2007, Pages 2646-2648,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 13, Issue 18,2007, Pages 2644,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 13, Issue 18,2007, Pages 2529-2534,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 13, Issue 18,2007, Pages 2554-2567,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 13, Issue 18,2007, Pages 2615-2618,