Br Med J. 1974 Aug 17;3(5928):470. doi: 10.1136/bmj.3.5928.470-b.
British medical journal
G Heard
PMID: 4414183 PMCID: PMC1611426 DOI: 10.1136/bmj.3.5928.470-b Free PMC Article
[No abstract available.]