Abstract

References
1.
Cullinan
E. R.
Kemp-Harper
(1953 ) In press.
2.
Aird
I.
(1949 ) Companion to Surgical Studies , Edinburgh . p. 574 .
3.
Bockus
H. L.
(1946 ) Gastroenterology , Vol. 1 , 764 .
4.
Morris
H.
(1952 ) Brit. J. Radiol. , 25 , 672 .
