Self-reported smoking status and plasma cotinine concentrations among pregnant women in the Norwegian Mother and Child Cohort Study

Estimates of Nondisclosure of Cigarette Smoking Among Pregnant and Nonpregnant Women of Reproductive Age in the United States

(2010) P. M. Dietz et al.   AMERICAN JOURNAL OF EPIDEMIOLOGY

Infant Birth Size Is Not Associated with Maternal Intake and Status of Folate during the Second Trimester in Norwegian Pregnant Women

(2010) Roy M. Nilsen et al.   JOURNAL OF NUTRITION

Evaluation of the accuracy of self-reported smoking in pregnancy when the biomarker level in an active smoker is uncertain

(2009) Igor Burstyn et al.   NICOTINE & TOBACCO RESEARCH

Self-selection and bias in a large prospective pregnancy cohort in Norway

(2009) Roy M. Nilsen et al.   PAEDIATRIC AND PERINATAL EPIDEMIOLOGY

Quantitative profiling of biomarkers related to B-vitamin status, tryptophan metabolism and inflammation in human plasma by liquid chromatography/tandem mass spectrometry

(2009) Øivind Midttun et al.   RAPID COMMUNICATIONS IN MASS SPECTROMETRY

Smoking during pregnancy from 1999 to 2004: a study from the Medical Birth Registry of Norway

(2008) Liv Grimstvedt Kvalvik et al.   ACTA OBSTETRICIA ET GYNECOLOGICA SCANDINAVICA

Optimal Serum Cotinine Levels for Distinguishing Cigarette Smokers and Nonsmokers Within Different Racial/Ethnic Groups in the United States Between 1999 and 2004

(2008) Neal L. Benowitz et al.   AMERICAN JOURNAL OF EPIDEMIOLOGY

Mid-Pregnancy Cotinine and Risks of Orofacial Clefts and Neural Tube Defects

(2008) Gary M. Shaw et al.   JOURNAL OF PEDIATRICS