More Information
Bibliography:href:bmj-2-1929.pdf
istex:638253285456F5D06926DF7FB0C3BB1D6BAF2529
local:bmj;2/5217/1929
PMID:13684293
ark:/67375/NVC-N8B3CSLB-K
ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:0007-1447
1468-5833
DOI:10.1136/bmj.2.5217.1929