Research Article
Southampton: the first years. VI--The fourth year: study indepth.
Br Med J 1976; 2 doi: https://doi.org/10.1136/bmj.2.6028.162 (Published 17 July 1976) Cite this as: Br Med J 1976;2:162This is a PDF-only article. The first page of the PDF of this article appears above.