Footnotes

• AC and SL are joint first authors.

• Correction notice This article has been corrected since it published Online First. The first authorship statement has been added.

• Contributors AC, SL and MG performed literature review, drafted the article and approved the final version.

• 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.