Br Med J. 1965 Dec 25;2(5477):1505-10. doi: 10.1136/bmj.2.5477.1505.
British medical journal
G Keynes
PMID: 5321828 PMCID: PMC1847298 DOI: 10.1136/bmj.2.5477.1505 Free PMC Article
[No abstract available.]