Professor Achala Upendra Jayatilleke
Postgraduate Institute of Medicine, University of Colombo
Population and fertility by age and sex for 195 countries and territories
GBD 2017 Population and Fertility Collaborators. Population and fertility by age and sex for 195 countries and territories, 1950–2017: a systematic analysis for the Global Burden of Disease Study 2017. Lancet. 2018 Nov 10;392(10159):1995-2051.