Articles ANNOTATIONS Br Med J 1957; 1 doi: https://doi.org/10.1136/bmj.1.5023.875 (Published 13 April 1957) Cite this as: Br Med J 1957;1:875 Article Related content Metrics Responses Peer review Related articles Correction Correction Published: 02 November 1946; Br Med J 2 doi:10.1136/bmj.2.4478.680