Br Med J (Clin Res Ed). 1987 Nov 07;295(6607):1177-82. doi: 10.1136/bmj.295.6607.1177.
British medical journal (Clinical research ed.)
R Smith
PMID: 3120935 PMCID: PMC1248250 DOI: 10.1136/bmj.295.6607.1177 Free PMC Article
[No abstract available.]