Footnotes

• Contributors EB performed experiments, collected data, drafted the initial manuscript, and reviewed and revised the manuscript. AC and SBo conceptualised and designed the study, drafted the initial manuscript, and reviewed and revised the manuscript. SBé and CL performed statistical analysis and reviewed and revised the manuscript. ES collected data. RC and PM-K critically reviewed the manuscript for important intellectual content.

• 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; externally peer reviewed.