Abstract
References
1.
Given
W P
Douglas
G
Tolstoi
E
. (1950 ) Amer. J. Obstet. Gynec.
59 , 729 .
2.
Oakley
W
. (1953 ) Brit. med. J.
i , 1413 .
3.
Oakley
W
. (1961 ) Proc. R. Soc. Med.
54 , 744 .