Br Med J. 1976 Dec 04;2(6048):1367-9. doi: 10.1136/bmj.2.6048.1367.
British medical journal
R Sweetnam
PMID: 1069599 PMCID: PMC1690250 DOI: 10.1136/bmj.2.6048.1367 Free PMC Article
[No abstract available.]