Lekamwasam, S.2013-11-272013-11-271999Journal of the Ceylon College of Physicians, 32(1):p.19-23https://dl.nsf.gov.lk/handle/1/10100Medical SciencesPopulation agingAging theoriesNational populationDNA damage theoriesAnti-aging therapyBuild-in breakdown theoriesMelatoninDehydroepiandrosteronAging of the population. mechanisms and impactA