More Information
Bibliography:href:bmj-297-1447.pdf
ark:/67375/NVC-FZVH8PLS-W
PMID:3147010
local:bmj;297/6661/1447
istex:6C3C423400C120F156DB98ED18D42B8872374D8E
ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:0959-8138
1468-5833
1756-1833
DOI:10.1136/bmj.297.6661.1447