Footnotes

• Contributors SLS and ARI wrote the mansucript.

• 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 SLS is supported by fellowships from the Canadian Institutes of Health Research and the Michael Smith Foundation for Health Research. ARI has received consulting honorarium from Boston Scientific and Canon Medical.

• Patient and public involvement Patients and/or the public were not involved in the design, or conduct, or reporting, or dissemination plans of this research.

• Patient consent for publication Not required.

• Provenance and peer review Commissioned; internally peer reviewed.