Br Med J. 1968 Feb 17;1(5589):447-8. doi: 10.1136/bmj.1.5589.447-c.
British medical journal
R B Bradfield, D E Curtis
PMID: 5639639 PMCID: PMC1985056 DOI: 10.1136/bmj.1.5589.447-c Free PMC Article
[No abstract available.]