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Bibliography:istex:25008EE3FB404744A24AD9435FD4A25B3C0C1DBC
PMID:13374335
ark:/67375/NVC-XQ38SJ9N-S
local:bmj;2/5005/1343
href:bmj-2-1343.pdf
ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:0007-1447
1468-5833
DOI:10.1136/bmj.2.5005.1343