Footnotes

• Contributors All authors met the criteria for authorship as recommended by the International Committee of Medical Journal Editors (ICMJE), were fully responsible for all content and editorial decisions, retained full control over all content contained in this report, and were involved with all stages of report development. IS: original draft. OB and MM-Z: critical review and approval of final manuscript

• 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.

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