Br Med J (Clin Res Ed). 1981 Jan 10;282(6258):117-8. doi: 10.1136/bmj.282.6258.117.
British medical journal (Clinical research ed.)
J Oldroyd
PMID: 6779899 PMCID: PMC1503866 DOI: 10.1136/bmj.282.6258.117
[No abstract available.]