Mettananda, D.S.G.; de Silva, D.G.H.; Jayasinghe, Y.C.; Waduge, T.R.W.; Pathmeswaran, A.; Abeysinghe, A.P.S.D.(Faculty of Medicine, University of Kelaniya & Plan International, 2008)
Herath, H.M.R.P.; Dissanayake, D.M.A.B.; Hilmi, M.A.M.; Pathmeswaran, A.; Wijesinghe, P.S.(Faculty of Medicine, University of Kelaniya & Plan International, 2008)