WORLD JOURNAL OF GASTROENTEROLOGY, Volume 9, Issue 6,2003, Pages 1352-1355,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 9, Issue 6,2003, Pages 1377-1380,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 9, Issue 6,2003, Pages 1333-1336,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 9, Issue 6,2003, Pages 1251-1255,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 9, Issue 6,2003, Pages 1356-1360,