Footnotes

• Contributors Both authors have made equal contributions to the conception of the paper, the acquisition, analysis and interpretation of appropriate references, the drafting and revision of the manuscript and the final approval of the submitted version.

• 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.

• Patient consent Not required.

• Provenance and peer review Commissioned; internally peer reviewed.

• Correction notice This article has been corrected since it was published Online First. In table 1, the treatment for severe hypothermia has been amended.