Footnotes

• Handling editor Anna Maria Geretti

• Twitter @giumas3

• Contributors Conceptualisation: AL, MZ. Data curation: EG, MG, MGD. Formal analysis: MGD, MZ. Investigation: AL, EG, FM, MG, MGD, MZ. Methodology: AL, MGD, MZ. Project administration: AL, MZ. Resources: VG, MP, MS, CS, LG, FP, ARB, AM. Supervision: AL, AM. Visualisation: AL, FM, EG, MGD, MZ. Writing–original draft: AL, FM, MGD, MZ. Writing–review and editing: EG, MG, VG, MP, MS, CS, LG, FP, ARB, AM.

• 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.