Dissanayake, J.K.Abeygunasekara, A.Jayasekara, R.Ratnatunga, C.Ratnatunaga, N.V.I.2016-01-142016-01-141994The Ceylon Medical Journal, 39(1)pp.48-50https://dl.nsf.gov.lk/handle/1/21469Medical SciencesArticle