Etchie TO, Etchie AT, Adewuyi GO, Pillarisetti A, Sivanesan S, Krishnamurthi K, Arora NK. 2018. The gains in life expectancy by ambient PM2.5 pollution reductions in localities in Nigeria. Environmental Pollution 236: 146-157. doi.org/10.1016/j.envpol.2018.01.034