1. Division of Oral Medicine, Department of Oral Medicine and Periodontology, Faculty of Dental Sciences, University of Peradeniya, Peradeniya, Sri Lanka
2. Department of Paediatrics, Faculty of Medicine, University of Peradeniya, Peradeniya, Sri Lanka
3. Department of Oral Medicine and Periodontology and Centre for Research in Oral Cancer, Faculty of Dental Sciences, University of Peradeniya, Peradeniya, Sri Lanka