Abstract
References
1.
Ashman
H
,
Zaroff
L I
&
Baronfsky
I
(1960 ) Amer. J. Med.
28 , 487
2.
Chin
E F
&
Ross
D N
(1957 ) Brit. med. J.
i , 1447
3.
McGregor
G A
&
Cullen
R A
(1959 ) Brit. med. J.
ii , 991