Abstract

References
1.
Douglas
A. J.
(1949 ) Canad. med. Ass. J. , 61 , 123 .
2.
Haglund
C.
(1951–2 ) Acta chir. scand. , 102 , 364 .
3.
Howkins
J.
,
McClaughlin
C. R.
, and
Daniel
P.
(1946 ) Lancet , i , 488 .
4.
Wilson
G.
, and
Winkelman
N. W.
(1925 ) Arch. Neurol. Psychiat., Chicago , 13 , 191 .
5.
Henson
R. A.
,
Crawford
J. V.
, and
Cavanagh
J. B.
(1953 ) J. Neurol. Psychiat. , 16 , 127 .
6.
Falconer
M. A.
(1949 ) J. Neurol. Psychiat. , 12 , 297 .
7.
Guidetti
C.
(1951 ) J. Neurosurg. , 7 , 499 .
8.
Olivecrona
H.
(1942 ) Arch. Neurol. Psychiat., Chicago , 47 , 544 .
9.
Sjöqvist
O.
(1938 ) Acta psychiat. neurol. , Suppl. 17.
10.
Weinberger
L. M.
, and
Grant
F. C.
(1943 ) Arch. Neurol. Psychiat., Chicago , 49 , 665 .
