1. Centre for Research in Oral Cancer, Faculty of Dental Sciences, University of Peradeniya, Kandy, Sri Lanka
2. Department of Oral Medicine and Periodontology, Faculty of Dental Sciences, University of Peradeniya, Kandy, Sri Lanka
3. Faculty of Dentistry, Oral & Craniofacial Sciences, King’s College London, London, UK
4. WHO Collaborating Centre for Oral Cancer, London, UK