Footnotes

• Contributors CV drafted the original version of the manuscript. LG and MT edited the original version of the manuscript. CV, LG and MT equally contributed to the final edits with submission being managed by CV. All authors have read and approved the final manuscript before submission.

• 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.

• Disclaimer The opinions or assertions expressed here are the private views of the authors and are not to be considered as official or as reflecting the views of the French Military Health Service and the Laureate Institute for Brain Research.

• Competing interests None declared.

• Provenance and peer review Not commissioned; internally peer reviewed.