Footnotes

• Handling editor Anna Maria Geretti

• Correction notice This article has been corrected since it was first published. The author Valeska Padovese was incorrectly listed as Padovese Valeska.

• Contributors MA was involved in drafting the manuscript, formatting and preparing the manuscript for submission. PV was involved in drafting and reviewing the manuscript. AS and LC were involved in management plan and data collection. MA, PV, AS and LC all contributed to the 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; internally peer reviewed.