alpha-FetoproteinsCarcinoma, HepatocellularLiver NeoplasmsFetal ProteinsPrenatal DiagnosisEstriolOccult BloodLiver CirrhosisHematologic TestsTumor Markers, BiologicalSensitivity and SpecificityPregnancyAlpha-GlobulinsLiverPrognosisp-DimethylaminoazobenzeneGuaiacRetrospective StudiesColonoscopyMass ScreeningSigmoidoscopyPregnancy Trimester, SecondColorectal NeoplasmsAlbuminsImmunodiffusionAmniotic FluidEarly Detection of Canceralpha 1-AntitrypsinLiver Neoplasms, ExperimentalRadioimmunoassayImmunochemistryReceptors, Adrenergic, alphaHepatectomyTranscription FactorsBase SequenceSerum AlbuminHypoxia-Inducible Factor 1, alpha SubunitReceptors, Cytoplasmic and NuclearEnemaBarium SulfateDNA-Binding ProteinsGestational AgeUnnecessary ProceduresMolecular Sequence DataPromoter Regions, GeneticDiagnostic Tests, RoutinePredictive Value of Testsalpha7 Nicotinic Acetylcholine Receptor