WORLD JOURNAL OF GASTROENTEROLOGY, Volume 10, Issue 9,2004, Pages 1353-1356,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 10, Issue 9,2004, Pages 1310-1314,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 10, Issue 9,2004, Pages 1306-1309,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 10, Issue 9,2004, Pages 1250-1255,