Medical Practice Personal View Br Med J (Clin Res Ed) 1982; 285 doi: https://doi.org/10.1136/bmj.285.6355.1650 (Published 04 December 1982) Cite this as: Br Med J (Clin Res Ed) 1982;285:1650 Article Related content Metrics Responses Peer review Related articles No related articles found.