Jayasena SN, Fernandopulle ANR,  Gunathillake KDK, Senanayake HM, de Silva MVC. Association of socioeconomic and environmental factors and antenatal care with perinatal deaths. (a) Sri Lanka College of Obstetricians and Gynaecologists. 37th Annual Scientific Sessions 2004.(b) Sri Lanka Medical Association. 118th Anniversary Academic Sessions.  2005.