AllelesMutationPoint MutationMolecular Sequence DataHeterozygoteDNA Mutational AnalysisBase SequencePolymerase Chain ReactionAmino Acid SequenceGenotypeGene FrequencyPolymorphism, GeneticPolymorphism, Single NucleotideGenetic Predisposition to DiseasePhenotypeHaplotypesGenetic VariationHomozygoteChromosome MappingLinkage DisequilibriumMicrosatellite RepeatsGenetic MarkersCase-Control StudiesHLA-DRB1 ChainsCrosses, GeneticPolymorphism, Restriction Fragment LengthModels, GeneticGenetics, PopulationSequence Analysis, DNAPedigreeGenetic LinkageGenetic Association StudiesAsian Continental Ancestry GroupExonsDNA PrimersHLA-DQ AntigensHLA-DR AntigensGenes, LethalSelection, GeneticGenetic LociGenes, DominantEuropean Continental Ancestry GroupHLA-B AntigensGenes, RecessiveApolipoprotein E4Suppression, GeneticDNARecombination, Genetic