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Contributors I am the sole contributor to this letter.
Funding The author has not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.
Competing interests I am the author of the book mentioned in this letter, but I have arranged that all proceeds otherwise due to me will be donated to The Museum of Military Medicine.
Patient consent for publication Not required.
Provenance and peer review Not commissioned; externally peer reviewed.
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