Br Med J. 1960 Jan 02;1(5165):32-4. doi: 10.1136/bmj.1.5165.32.
British medical journal
P H Simmons, M P Curwen
PMID: 20788848 PMCID: PMC1966432 DOI: 10.1136/bmj.1.5165.32
[No abstract available.]