Abstract

References
1.
Blendis
L M
Ansell
I D
Lloyd-Jones
K
Hamilton
E
Williams
R
. (1970 ) Brit. med. J.
i , 131 .
2.
Murray-Lyon
I M
Thompson
R P H
Ansell
I D
Williams
R
. (1970 ) Brit. med. J (in press).
