Footnotes

• Twitter @Oke_jason

• Contributors JO and HGW conceived the idea, drafted the first version of the manuscript and equally contributed to revisions. JO is the guarantor.

• Funding The authors have not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.

• Competing interests None declared.

• Provenance and peer review Not commissioned; externally peer reviewed.