Footnotes

• Handling editor Josef S Smolen

• Twitter @A_Latourte

• Contributors Conception of the work: AL, H-KE, AF, FL, TB, PR. Acquisition, analysis or interpretation of data: all authors. Drafting the work or revising it critically for important intellectual content: all authors. Final approval of the version submitted: all authors.

• 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 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 Not commissioned; externally peer reviewed.