Br Med J (Clin Res Ed). 1985 Nov 16;291(6506):1409-12. doi: 10.1136/bmj.291.6506.1409.
British medical journal (Clinical research ed.)
R Smith
PMID: 3933688 PMCID: PMC1418980 DOI: 10.1136/bmj.291.6506.1409 Free PMC Article
[No abstract available.]