Abstract

References
1.
Berglund
G
Zetterstrom
R
. (1954 ) Acta pædiat., Stockh.
43 , 368 .
2.
Brudenell
J M
Miles
J M
Coleman
A
. (1961 ) J. Obstet. Gynæc., Brit. Comm.
68 , 238 .
3.
Dixon
H G
Robertson
W B
. (1958 ) J. Obstet. Gynæc., Brit. Emp.
65 , 803 .
4.
Peel
J
. (1962 ) Amer. J. Obstet. Gynec.
83 , 847 .
5.
White
P
Hunt
H
. (1940 ) J. Amer. med. Ass.
115 , 2039 .
