Correspondence Trilene in Labour Br Med J 1947; 1 doi: https://doi.org/10.1136/bmj.1.4497.355-a (Published 15 March 1947) Cite this as: Br Med J 1947;1:355 Article Related content Metrics Responses Peer review Related articles No related articles found. See more Covid-19: Metformin reduces the risk of developing long term symptoms by 40%, study finds BMJ June 08, 2023, 381 p1306; DOI: https://doi.org/10.1136/bmj.p1306 Colombia’s government fractures under weight of radical health reform BMJ June 08, 2023, 381 p1315; DOI: https://doi.org/10.1136/bmj.p1315 Ultraprocessed food: Report calls for action to reduce levels in infant and baby food BMJ June 08, 2023, 381 p1318; DOI: https://doi.org/10.1136/bmj.p1318 Covid-19: UK’s pandemic inquiry prepares to hear from witnesses BMJ June 08, 2023, 381 p1314; DOI: https://doi.org/10.1136/bmj.p1314 England’s 10 000 “missing managers” are holding back the NHS, says think tank BMJ June 08, 2023, 381 p1313; DOI: https://doi.org/10.1136/bmj.p1313