Abstract
References
1.
Bell
C M A
Lewis
C B
. (1968 ) Brit. med. J.
iii , 587 .
2.
Osserman
K E
Genkins
G
. (1966 ) Ann. N. Y. Acad. Sci.
135 , 312 .
3.
Simpson
J A
. (1958 ) Brain
81 , 112 .