CotinineTobacco Smoke PollutionNicotineSmokingSalivaPyrrolidinonesRisk AssessmentNitrosaminesBiological MarkersGanglionic StimulantsReproducibility of ResultsNicotinic AgonistsEnvironmental ExposureTarsTobacco Use DisorderSmoking CessationSensitivity and SpecificitySelf DisclosureQuestionnairesAryl Hydrocarbon HydroxylasesAnabasineCarbon MonoxideEnvironmental MonitoringGlucuronidesMaternal ExposureCross-Sectional StudiesPregnancyMeconiumTandem Mass SpectrometryTobacco Use Cessation ProductsAir Pollution, IndoorNursing AssessmentChromatography, LiquidGlucuronates