Abstract

References
1.
Cheney
W D
. (1965 ) American Journal of Roentgenology
94 , 595
2.
Harris
D K
Adams
W G F
. (1967 ) British Medical Journal
iii , 712
3.
Newton
T H
Carpenter
M F
. (1959 ) British Journal of Radiology
32 , 739
4.
Waldmann
T A
. (1970 ) In: Modern Trends in Gastroenterology . Ed.
Card
W I
Creamer
B
. London ; p 125
5.
Gorham
L W
Wright
A W
Shultz
H H
Maxon
F C
Jr
(1954 ) American Journal of Medicine
17 , 674
6.
Krikler
D M
. (1955 ) South African Medical Journal
29 , 1050
