Br Med J. 1974 Aug 10;3(5927):414. doi: 10.1136/bmj.3.5927.414.
British medical journal
D S Reeves, R Wise
PMID: 4852981 PMCID: PMC1613165 DOI: 10.1136/bmj.3.5927.414 Free PMC Article
[No abstract available.]