WORLD JOURNAL OF GASTROENTEROLOGY, Volume 9, Issue 5,2003, Pages 970-973,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 9, Issue 5,2003, Pages 1008-1013,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 9, Issue 5,2003, Pages 894-898,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 9, Issue 5,2003, Pages 915-920,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 9, Issue 5,2003, Pages 1106-1110,