More Information
Bibliography:istex:771C6227AFD8521A024A038CA7534B812742FAA4
ark:/67375/NVC-6C8N8QR1-W
PMID:1139235
local:bmj;3/5975/76
href:bmj-3-76.pdf
ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:0007-1447
1468-5833
DOI:10.1136/bmj.3.5975.76