Research Article Policies on prevention. Br Med J (Clin Res Ed) 1984; 288 doi: https://doi.org/10.1136/bmj.288.6425.1182 (Published 21 April 1984) Cite this as: Br Med J (Clin Res Ed) 1984;288:1182 Article Related content Metrics Responses Peer review Related articles No related articles found.