Intended for healthcare professionals

Medical Practice

Medicine and the Media

Br Med J (Clin Res Ed) 1982; 284 doi: https://doi.org/10.1136/bmj.284.6324.1258 (Published 24 April 1982) Cite this as: Br Med J (Clin Res Ed) 1982;284:1258
PDF extract preview

This is a PDF-only article. The first page of the PDF of this article appears above.

Log in

Log in through your institution

Subscribe

* For online subscription