Key points are not available for this paper at this time.
Ceylon Medical Journal (CMJ) is a peer-reviewed, open access journal published quarterly by the Sri Lanka Medical Association in the last week of March, June, September and December each year. The mission of the CMJ is to promote the science and art of medicine and betterment of public health. The Journal publishes original papers and commentaries which have relevance to medicine and allied sciences. The CMJ is committed to maintaining and conforming to the editorial and ethical standards recommended by the International Committee of Medical Journal Editors.
Perera et al. (Tue,) studied this question.