<qa>  What is the reason for excluding participants with more than 10 years of Crohns disease1. Participants with greater than 10 years of Crohns disease requiring their FIRST resection of a short 10cm fibrostenotic stricture. The rationale for excluding these participants is that historically this group of participants is at a very low risk of recurrence and therefore, would not be a group targeted for postoperative medical therapy. 