[1] Natl Dent Hosp Teaching Sri Lanka, Prevent Oral Hlth Unit, Ward Pl, Colombo 7, Sri Lanka
[2] Apeksha Hosp, Natl Canc Inst Sri Lanka, Psychiat Unit, Maharagama, Sri Lanka
[3] Natl Dent Hosp Teaching Sri Lanka, Off Deputy Director, Colombo, Sri Lanka
[4] Univ Peradeniya, Fac Dent Sci, Dept Oral & Maxillofacial Surg, Peradeniya, Sri Lanka
[5] Natl Hosp, Off Deputy Director, Colombo, Sri Lanka
[6] Asiri Surg Hosp, Dept Dent Surg, Colombo, Sri Lanka