Br Med J. 1974 Feb 09;1(5901):244. doi: 10.1136/bmj.1.5901.244.
British medical journal
R B Welbourn, A G Cox
PMID: 4818169 PMCID: PMC1633129 DOI: 10.1136/bmj.1.5901.244 Free PMC Article
[No abstract available.]