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Bibliography:istex:11EE12A984B57186C0B1C6F34B10BE79D9861967
PMID:3099950
href:bmj-293-1540-1.pdf
ark:/67375/NVC-LKLKX827-S
local:bmj;293/6561/1540
ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
ObjectType-News-3
content type line 23
ISSN:0267-0623
1468-5833
DOI:10.1136/bmj.293.6561.1540