Muhammed Hameed Thoufeeq1, Javaid Ishtiaq2, Mohamed Abuzakouk3. 1. Department of Gastroenterology, Leeds Teaching Hospitals, Leeds, UK. mo.thoufeeq@gmail.com. 2. Department of Gastroenterology, Diana Princess of Wales Hospital, Grimsby, UK. 3. Department of Immunology, Hull and East Yorkshire NHS Trust, Hull, UK.