Abstract

References
1.
Greenough
W B
. (1965 ) Lancet
ii , 991 .
2.
Hendrix
T R
Banwell
J G
. (1969 ) Gastroenterology
57 , 751 .
3.
Love
A H G
Mitchell
J
Phillips
R A
. (1968 ) J. Physiol.
195 , 133 .
4.
Sladen
G E
Dawson
A M
. (1969 ) Gut
10 , 82 .
5.
Veall
N
. (1971 ) Proc. roy. Soc. Med.
64 , 1028 .
