Green Health & Wellness Use of nitrous oxide for execution is a concerning development in ongoing medicalisation of the death penalty – GWC Mag gwcmagMarch 18, 2024050 views This article (BMJ 2024;384:q593, doi:10.1136/bmj.q593) incorrectly stated that Kenneth Eugene Smith was killed by nitrous oxide, when this should have said nitrogen gas. This article was corrected on 18 March 2024.