Maternal smoking and Down syndrome.

le Christianson, R E, Torfs, C P
Foilsithe 1988

Black-white differences in serum cotinine levels among pregnant women and subsequent effects on infant birthweight.

le English, P B, Eskenazi, B, Christianson, R E
Foilsithe 1994

Passive and active maternal smoking as measured by serum cotinine: the effect on birthweight.

le Eskenazi, B, Prehn, A W, Christianson, R E
Foilsithe 1995

Incidence of congenital anomalies among white and black live births with long-term follow-up.

le Christianson, R E, van den Berg, B J, Milkovich, L, Oechsli, F W
Foilsithe 1981

Thyroid antibodies as a risk factor for Down syndrome and other trisomies.

le Torfs, C P, van den Berg, B J, Oechsli, F W, Christianson, R E
Foilsithe 1990