Footnotes

• Contributors OR—conceptualisation, methodology, writing (original draft), data curation and visualisation. AH—writing (original draft), data curation and visualisation. AS—methodology, formal analysis and writing (original draft). PS—writing (original draft) and data curation. SB—writing (original draft) and data curation. MR—writing (review and editing). SAH—writing (review and editing). PM-F—supervision, project administration, resources and writing (review and editing). DS—supervision, project administration, resources, conceptualisation and writing (review and editing).

• 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; internally peer reviewed.