Tej Gadhia1, Oluyori Kutulola Adegun2, Farida Fortune2. 1. Department of Oral Medicine, Dental Institute, Royal London Hospital, Barts Health NHS Trust, London, UK. 2. Centre for Clinical and Diagnostic Oral Sciences, Institute of Dentistry, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London, UK.