Articles Annotations Br Med J 1937; 2 doi: https://doi.org/10.1136/bmj.2.4004.668 (Published 02 October 1937) Cite this as: Br Med J 1937;2:668 Article Related content Metrics Responses Peer review Related articles Correction Correction Published: 17 November 1945; Br Med J 2 doi:10.1136/bmj.2.4428.714