More Information
Bibliography:istex:C0241EEEFB3A6FAC4EA6B5FB45096B87CDBED923
ark:/67375/NVC-S1SR8ZG7-0
local:bmj;2/5306/700
href:bmj-2-700.pdf
ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:0007-1447
1468-5833
DOI:10.1136/bmj.2.5306.700