Abstract
References
1.
Dixon
J M S
(1965 ) Brit. med. J.
ii , 1343
2.
Donaldson
R M
(1964 ) New Engl. J. Med.
270 , 1050
3.
Kellock
T D
(1966 ) Proc. R. Soc. Med.
59 , 132
4.
Taylor
K B
(1965 ) In: Recent Advances in Gastroenterology. Ed.
Badenoch
J
Brooke
B N
London; p 41