Abstract
References
1.
Fox
J A
. (1967 ) Brit. J. Surg.
54 , 867 .
2.
Fox
J A
. (1969 ) Brit. med. J.
iii , 50 .
3.
Niwa
H
Utsumi
Y
Nakamura
T
Yoshida
A
Yoshitoshi
Y
Fujino
M
Kaneko
E
Ksumi
A
Matsumoto
M
. (1969 ) Gastroenterological Endoscopy (Tokyo)
11 , 163 .
4.
Provenzale
L
Camerada
P
Revignas
A
. (1966 ) Rass. med. sarda
69 , 149 .
5.
Devlin
H B
Plant
J A
Griffin
M
. (1971 ) Brit. med. J.
iii , 413 .