Br Med J (Clin Res Ed). 1981 Aug 01;283(6287):369-71. doi: 10.1136/bmj.283.6287.369.
British medical journal (Clinical research ed.)
S M Gore
PMID: 6788334 PMCID: PMC1506159 DOI: 10.1136/bmj.283.6287.369
[No abstract available.]