GenotypePhylogenySequence Analysis, DNAGenes, DominantPolymorphism, GeneticAllelesPolymorphism, Single NucleotideGenetic Predisposition to DiseaseGene FrequencyPhenotypeGenetic VariationPolymerase Chain ReactionMolecular Sequence DataMutationPedigreeHaplotypesCase-Control StudiesPolymorphism, Restriction Fragment LengthBase SequenceHomozygoteGenetic MarkersHeterozygoteHepacivirusGenetic LinkageChinaMolecular EpidemiologyChromosome MappingModels, GeneticRisk FactorsDNA Mutational AnalysisAsian Continental Ancestry GroupMethylenetetrahydrofolate Reductase (NADPH2)DNA PrimersCluster AnalysisGlutathione TransferaseLinkage DisequilibriumGenotyping TechniquesMutation, MissenseHepatitis CRNA, ViralMicrosatellite RepeatsCrosses, GeneticHepatitis C, ChronicHepatitis B virusRibavirinPeptidyl-Dipeptidase ACatechol O-MethyltransferaseAmino Acid SubstitutionAntiviral AgentsGenes, RecessivePromoter Regions, Genetic