More Information
Bibliography:href:bmj-3-92.pdf
PMID:5041140
local:bmj;3/5818/92
ark:/67375/NVC-18HPMNFC-J
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content type line 23
ObjectType-Report-1
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ISSN:0007-1447
1468-5833
DOI:10.1136/bmj.3.5818.92