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Contributors JH and KBJ contributed to the conception and design of this 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 KBJ is the executive section editor for Anesthetic Clinical Pharmacology, Anesthesia and Analgesia and is an equity partner for Applied Medical Visualizations.
Patient consent for publication Not required.
Provenance and peer review Not commissioned; internally peer reviewed.