Abstract

References
1.
Geist
D C
, (1933 ) Gastroenterology
20 , 56
2.
Hughes
L E
, (1969 ) Gut
10 , 336
3.
Mayo
C W
Blunt
C P
, (1950 ) Surgical Clinics of North America
30 , 1005
4.
Nicholas
E E
Frymark
W B
Raffensperger
J R
, (1962 ) Journal of the American Medical Association
182 , 157
5.
Parks
T G
, (1968 ) Proceedings of the Royal Society of Medicine
61 , 932
6.
Perry
P M
Morson
B C
, (1971 ) British Journal of Surgery
58 , 902
7.
Slack
W W
, (1962 ) British Journal of Surgery
50 , 185
8.
Wagner
D E
Zollinger
R W
, (1961 ) Archives of Surgery
83 , 124
