Abstract

References
1.
Green W.M.
,
King D.L.
, &
Casarella W.J.
(1976 ) Radiology 121 , 163 –171
2.
Roylance J.
,
Davies E.R.
, &
Alexander W.D.
(1973 ) British Journal of Radiology 46 , 960 –963
3.
Sherwood T.
(1975 ) British Medical Journal iv , 682 –683
4.
Sherwood T.
, &
Stevenson J.J.
(1971 ) Clinical Radiology 22 , 180 –187
5.
Sherwood T.
, &
Trott P.A.
(1975 ) British Medical Journal iii , 755 –758
6.
von Schreeb T.
,
Amer O.
,
Skovsted G.
, &
Wikstad N.
(1967 ) Scandinavian Journal of Urology and Nephrology 1 , 270 –276 .
