The purpose of this study is to compare the effectiveness of weekly subcutaneously
administered Methotrexate for maintaining relapse-free sustained steroid/Enteral Nutrition
-free 1-year remission compared with:
- daily oral Azathioprine / 6 mercaptopurine in low risk paediatric Crohn's disease
- subcutaneously administered adalimumab in high risk paediatric Crohn's disease