1. Department of Oral and Maxillofacial Surgery, Faculty of Dental Sciences, University of Peradeniya, Peradeniya, Sri Lanka
2. Preventive Oral Health Unit, National Dental Hospital (Teaching), Colombo, Sri Lanka
3. Department of Oral Medicine and Periodontology, Faculty of Dental Sciences, University of Peradeniya, Peradeniya, Sri Lanka
4. Department of Dental Surgery, Asiri Surgical Hospital, Colombo, Sri Lanka
5. Department of Psychiatry, Faculty of Medicine, University of Colombo, Colombo, Sri Lanka