Footnotes

• Contributors The papers for inclusion in the literature highlights were selected by EC and TRS. EC wrote the first draft and the final submission was reviewed by EC and TRS.

• 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 Not commissioned; internally peer reviewed.