Lead Poisoning, Nervous System, ChildhoodLead PoisoningLeadPaintEnvironmental ExposureHousingCooking and Eating UtensilsPicaNevadaGasolineEnvironmental PollutantsStanford-Binet TestMass ScreeningInfant, NewbornUnited StatesAnticholesteremic AgentsCholesterol, LDLDouble-Blind MethodHypercholesterolemiaHeptanoic AcidsCholesterol, HDLHematinicsHypoglycemiaRisk FactorsPyrrolesErythrocyte TransfusionHemoglobinsAnemiaIntelligenceBlood GlucoseCholesterolDrug Therapy, CombinationHypoglycemic AgentsProspective StudiesErythropoietinCritical IllnessFollow-Up StudiesTriglycerides