Research Article

A J Macleod of North Uist.

Br Med J (Clin Res Ed) 1982; 284 doi: https://doi.org/10.1136/bmj.284.6315.561 (Published 20 February 1982) Cite this as: Br Med J (Clin Res Ed) 1982;284:561

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

PDF extract preview