Abstract
References
1.
Beecher
H K
. (1957 ) Pharmacol. Rev.
9 , 59
2.
Cahal
D A
Dare
J
Keith
D
. (1961 ) J. Obstet. Gynæc. Brit. Emp.
61 , 88
3.
Keele
K D
. (1948 ) Lancet
ii , 6