RESULTS	Mayo score ( including clinical and endoscopic features ) decreased significantly in the L. reuteri group ( 3.2 1.3 vs. 8.6 0.8 , P < 0.01 ) compared with placebo ( 7.1 1.1 vs. 8.7 0.7 , NS ) ; furthermore , histological score significantly decrease only in the L. reuteri group ( 0.6 0.5 vs. 4.5 0.6 , P < 0.01 ) ( placebo : 2.9 0.8 vs. 4.6 0.6 , NS ) .\