Footnotes

• Contributors Both authors equally contributed to the published work.

• 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 HSC: consultancy and proctorship agreements with Medtronic and MicroVention Inc. (Aliso Viejo, CA, USA) and shareholder of NDI Technologies and Vesalio, LLC. He is a non-paid member of the Siemens Senior Advisory Board. IS: consultancy and proctorship agreements with Medtronic and MicroVention Inc. (Aliso Viejo, CA, USA).

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