Articles NEWS AND NOTES Br Med J (Clin Res Ed) 1987; 294 doi: https://doi.org/10.1136/bmj.294.6569.448 (Published 14 February 1987) Cite this as: Br Med J (Clin Res Ed) 1987;294:448 Article Related content Metrics Responses Peer review Related articles No related articles found.