[1] Univ New S Wales, Sch Publ Hlth & Community Med, Sydney, NSW 2052, Australia
[2] Queensland Univ Technol, Fac Hlth, Inst Hlth & Biomed Innovat, Brisbane, Qld 4001, Australia
[3] Univ Colombo, Fac Med, Dept Clin Med, Diabet Res Unit, Colombo, Sri Lanka
[4] Univ Kelaniya, Fac Med, Dept Publ Hlth, Ragama, Sri Lanka
[5] Univ Colombo, Fac Med, Colombo 9, Sri Lanka
[6] Univ Kelaniya, Fac Med, Med Educ Ctr, Ragama, Sri Lanka
[7] Univ Peradeniya, Dept Psychiat, Peradeniya, Sri Lanka