Morrell, Stephen
Taylor, Richard
Nand, Devina
Rao, Chalapati
Article History
Received: 26 November 2018
Accepted: 4 April 2019
First Online: 2 May 2019
Ethics approval and consent to participate
: Not applicable. No ethics approval was needed for this study as it relies entirely on publicly available mortality and population data.
: Not Applicable.
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.