Footnotes

• Collaborators INRECSURE study group.

• Contributors SN and GV conceived the work, revised it critically for important intellectual content, approved the final version and agree to be accountable for all aspects of the work. AB, LG and AP analysed data, revised it critically for important intellectual content, approved the final version and agree to be accountable for all aspects of the work.

• 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.