Br Med J. 1960 Nov 19;2(5211):1467-73. doi: 10.1136/bmj.2.5211.1467.
British medical journal
F R Bettley
PMID: 20788988 PMCID: PMC2097623 DOI: 10.1136/bmj.2.5211.1467
[No abstract available.]