Prathapan, R.; Dodampahala, S.H.; Wijeyaratne, C.N.; Jayawardana, A.; Prathapan, S.; Wijerathne, S.; Wijesingha, E.; Abrew, K.A.G; Wickmmasinghe, S.W.A.D.; Priyanga, L.M; Karunarathne, D.A.S.
(The Sri Lanka College of Obstetricians and Gynaecologists, 2007)