(Q67658082)
Statements
The effect of smoking in pregnancy on maternal serum alpha-fetoprotein, unconjugated oestriol, human chorionic gonadotrophin, progesterone and dehydroepiandrosterone sulphate levels (English)
H. S. Cuckle
N. J. Wald
J. W. Densem
P. Royston
G. J. Knight
J. E. Haddow