Abstract
References
1.
Southwood
W F W
(1962 ) Ann. R. Coll. Surg. Engl . 30 , 23
2.
Sunderland
D A
Binkley
G E
(1948 ) Cancer, N. Y . 1 , 184
3.
Welch
C A
McKittrick
J B
Behringer
G
(1952 ) New Engl. J. Med.
247 , 959