1. Gastroenterology Royal Devon and Exeter NHS Foundation Trust Exeter UK
2. Exeter Inflammatory Bowel Disease and Pharmacogenetics Research Group University of Exeter Exeter UK
3. Leeds Gastroenterology Institute, Leeds Teaching Hospitals NHS Trust Leeds UK
4. The Leeds Institute of Research at St James' University of Leeds Leeds UK
5. Biochemistry, Exeter Clinical Laboratory International Royal Devon and Exeter NHS Foundation Trust Exeter UK