WORLD JOURNAL OF GASTROENTEROLOGY, Volume 9, Issue 12,2003, Pages 2782-2785,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 9, Issue 12,2003, Pages 2671-2675,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 9, Issue 12,2003, Pages 2737-2741,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 9, Issue 12,2003, Pages 2883-2884,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 9, Issue 12,2003, Pages 2870-2872,