Abstract
References
1.
Bergen
J J
Gilliland
V
Troop
C
Anderson
M C
(1964 ) J. Amer. med. Ass.
187 , 117 .
2.
Kobold
E E
Thal
A P
(1963 ) Surg. Gynec. Obstet.
117 , 315 .
3.
Marston
A
(1964 ) Ann. R. Coll. Surg. Engl.
35 , 151 .