1. Department of Medicine and Surgery, Gastroenterology University of SalernoItaly
2. Department of Gastroenterology Division of Diabetes and Nutritional Sciences Kings College London London UK
3. The Rayne Institute St Thomas HospitalLondon UK
4. Academic Department of Neurosciences Sheffield Teaching Hospitals NHS Trust Sheffield UK
5. Royal Hallamshire HospitalSheffield UK
6. School of Medicine University of Tampere Department of Internal Medicine Tampere University Hospital Department of Internal Medicine Seinäjoki Central HospitalFinland
7. Department of Medical Epidemiology and Biostatistics Karolinska Institutet and Department of Pediatrics Örebro University HospitalSweden
8. Coeliac UKHigh Wycombe Buckinghamshire UK
9. Gastroenterology and Liver Unit Royal Hallamshire Hospital University of SheffieldSheffield UK
10. Cambridge Intestinal Unit Addenbrooke's HospitalCambridge UK
11. Department of Dermatology St Mary's Hospital Imperial College Healthcare NHS TrustLondon UK
12. Department of Gastroenterology University Hospital LlandoughCardiff UK