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Pregnancy
Maternal-Fetal Exchange
Newborn Infant
Spain
Smoking
Substance Abuse Detection
Gas Chromatography-Mass Spectrometry
Cohort Studies
Biological Markers
Prevalence
Meconium
Hair
Cotinine
Nicotine
Dermatophagoides Antigens
Narcotics
Tobacco Smoke Pollution
Prenatal Exposure Delayed Effects
Maternal Exposure
Substance-Related Disorders
Co-Publications
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