Abstract

References
1.
Fox
M
,
Power
R F
&
Bruce
A W
(1962 ) Brit. J. Urol . 34 , 286
2.
Hamilton
A J C
(1943 ) Edinb. med. J . 50 , 513
3.
Miller
A
(1958 ) Brit. J. Urol . 30 , 43
4.
Smith
J C
(1968 ) Brit. J. Urol . 40 , 125
5.
Smith
J C
,
Edwards
D
&
Bryant
G
(1966 ) Brit. J. Urol . 38 , 542
