WORLD JOURNAL OF GASTROENTEROLOGY, Volume 8, Issue 5,2002, Pages 901-907,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 8, Issue 5,2002, Pages 908-912,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 8, Issue 5,2002, Pages 841-846,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 8, Issue 5,2002, Pages 792-796,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 8, Issue 5,2002, Pages 888-892,