Articles
NEWS AND NOTES
Br Med J (Clin Res Ed) 1987; 294 doi: https://doi.org/10.1136/bmj.294.6564.126 (Published 10 January 1987) Cite this as: Br Med J (Clin Res Ed) 1987;294:126This is a PDF-only article. The first page of the PDF of this article appears above.
Log in
Log in using your username and password
Log in through your institution
Subscribe from £184 *
Subscribe and get access to all BMJ articles, and much more.
* For online subscription
Access this article for 1 day for:
£50 / $60/ €56 (excludes VAT)
You can download a PDF version for your personal record.