WORLD JOURNAL OF GASTROENTEROLOGY, Volume 16, Issue 7,2010, Pages 886-896, doi:10.3748/wjg.v16.i7.886
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 16, Issue 7,2010, Pages 787-799, doi:10.3748/wjg.v16.i7.787
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 16, Issue 7,2010, Pages 881-885, doi:10.3748/wjg.v16.i7.881
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 16, Issue 7,2010, Pages 837-845, doi:10.3748/wjg.v16.i7.837