alpha-FetoproteinsCarcinoma, HepatocellularLiver NeoplasmsFetal ProteinsPrenatal DiagnosisEstriolLiver CirrhosisTumor Markers, BiologicalPregnancyAlpha-GlobulinsLiverPrognosisp-DimethylaminoazobenzeneSensitivity and SpecificityRetrospective StudiesPregnancy Trimester, SecondAlbuminsImmunodiffusionAmniotic Fluidalpha 1-AntitrypsinLiver Neoplasms, ExperimentalRadioimmunoassayReceptors, Adrenergic, alphaHepatectomyTranscription FactorsBase SequenceSerum AlbuminHypoxia-Inducible Factor 1, alpha SubunitReceptors, Cytoplasmic and NuclearDNA-Binding ProteinsGestational AgeMolecular Sequence DataPromoter Regions, Geneticalpha7 Nicotinic Acetylcholine Receptor