Footnotes

• Contributors SR and AR conceived and designed the editorial. SR analysed the data. SR and AR wrote the manuscript. All authors had full access to all the data reported in the original article within this editorial and had final responsibility for the decision to submit for publication.

• 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 Commissioned; externally peer reviewed.