A descriptive study of the prevalence of Factor V (F5) 1691G>A, Prothrombin (F2) 20210G>A and methylenetetrahydrofolate 677C>T polymorphisms among patients with thromboembolism in the Sri Lankan population. International conference on Frontiers in Molecular Life Sciences. September 16 -18, 2009. Colombo, Sri Lanka. (Abstracted in the Proceedings of the Conference:36)