@article{Ahmed2019,
author = {Ahmed, S. and Choi, Y.J.},
title= {Trends in contraceptive prevalence rates in sub-Saharan Africa since the 2012 London Summit on Family Planning: Results from repeated cross-sectional surveys},
year = {2019},
doi = {10.1016/S2214-109X(19)30200-1},
volume = {7},
number = {7},
pages = {904--911},
}