Footnotes

• Contributors We have both contributed to the concept and the writing of this editorial. RM wrote the initial article after discussion with CP and then the article was completed and edited by CP.

• 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.

• Patient consent for publication Not required.

• Provenance and peer review Commissioned; internally peer reviewed.