Abstract
References
1.
Hoffman
W A
Rosenberg
M A
. (1972 ) American Journal of Gastroenterology
58 , 508 .
2.
Lockhart-Mummery
H E
. (1972 ) British Journal of Surgery
59 , 823 .
3.
Schmidt
G T
Lennard-Jones
J E
Morson
B C
Young
A C
. (1968 ) Gut
9 , 7 .