Footnotes

• Handling editor Anna Maria Geretti

• Contributors CMFM: conceptualisation; data curation; formal analysis; investigation; methodology; roles/writing—original draft; writing—review and editing. NPM: conceptualisation; data curation; formal analysis; investigation; methodology; roles/writing—original draft; writing—review and editing. VOD: conceptualisation; formal analysis; writing—review and editing. DRBM: conceptualisation; formal analysis; writing—review and editing. EAO: formal analysis; investigation; methodology; writing—review and editing. HM-J: conceptualisation; formal analysis; methodology; project administration; supervision; roles/writing—original draft; 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.