IM Spence-Lewis MD, 16 Jul 2018 https://bmcpublichealth.biomedcentral.com/articles/10.1186/s12889-016-2772-z
IM Spence-Lewis MD, 15 Jun 2017 https://bmcpublichealth.biomedcentral.com/articles/10.1186/s12889-016-2772-z