Sumathipala, A.Siribaddana, S.de Silva, N*.2014-10-292014-10-292003The Ceylon Medical Journal. 2003; 48(4): pp.136-390009-0875 (Print)http://repository.kln.ac.lk/handle/123456789/1596Indexed in MEDLINENo Abstract AvailableResearchArticleFamily Medicine