A descriptive study of the prevalence of factor V ( F5 ) 1691 G>A, Prothrombin ( F2 ) 20210       G>A and methylenetetrahydrofolate reductase ( MTHFR ) 677 C>T polymorphisms among patients with       thromboembolism in the Sri Lanka Population. 9th Annual Scientific Sessions of the Sri Lanka College of Haematologist.       August 29-30, 2008. Colombo, Sri Lanka. (Abstracted in the Proceedings of the 9th Annual Academic Sessions The       College of Haematologist of Sri Lanka, 29.