Abstract

References
1.
de Dombal
F T
Fletcher
D M
Harris
R S
. (1969 ) Gut
10 , 131 .
2.
Marcuson
R W
Stewart
J O
Marston
A
. (1971 ) (in preparation).
3.
Marston
A
Thomas
M L
Morson
B C
. (1966 ) Proc. roy. Soc. Med.
59 , 881 .
4.
Braunwald
E
Chidsey
C A
. (1965 ) Proc. roy. Soc. Med.
58 , 1063 .
5.
Ottinger
L W
Austen
W G
. (1967 ) Surg. Gynec. Obstet.
124 , 251 .
6.
Samuel
E
. (1967 ) Proc. roy. Soc. Med.
60 , 839 .
