Research Article
London Youth Advisory Centre.
Br Med J (Clin Res Ed) 1982; 284 doi: https://doi.org/10.1136/bmj.284.6316.633 (Published 27 February 1982) Cite this as: Br Med J (Clin Res Ed) 1982;284:633This is a PDF-only article. The first page of the PDF of this article appears above.