[1] Rajarata Univ Sri Lanka, Fac Med & Allied Sci, Dept Community Med, Saliyapura, Sri Lanka
[2] Univ Cambridge, Cambridge Publ Hlth, Cambridge, England
[3] Minist Hlth Nutr & Indigenous Med, Colombo, Sri Lanka
[4] Teaching Hosp Kandy, Dept Radiol, Kandy, Sri Lanka
[5] Glasgow Caledonian Univ London, London, England
[6] Mental Hlth Fdn, London, England
[7] De Montfort Univ, Fac Hlth & Life Sci, Leicester, Leics, England