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Bibliography:href:bmj-1-1202.pdf
local:bmj;1/5234/1202
ark:/67375/NVC-Q7FLRVC2-9
PMID:13698131
istex:AF5885AABE3292214D6628621BDE0472D5F8B2C8
ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:0007-1447
1468-5833
DOI:10.1136/bmj.1.5234.1202