Footnotes

• Contributors All authors contributed to the current work equally.

• 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 DL is a speaker, proctor, receives research grants and is an advisor for Medtronic.

• Patient consent for publication Not required.

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