Articles Reviews Br Med J 1930; 1 doi: https://doi.org/10.1136/bmj.1.3606.289 (Published 15 February 1930) Cite this as: Br Med J 1930;1:289 Article Related content Metrics Responses Peer review Related articles Correction Corrigenda Published: 10 March 1945; Br Med J 1 doi:10.1136/bmj.1.4392.356