WORLD JOURNAL OF GASTROENTEROLOGY, Volume 9, Issue 11,2003, Pages 2450-2454,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 9, Issue 11,2003, Pages 2609-2611,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 9, Issue 11,2003, Pages 2616-2618,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 9, Issue 11,2003, Pages 2480-2483,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 9, Issue 11,2003, Pages 2424-2427,