PhenotypeFrasier SyndromeGenotypeDNA Mutational AnalysisNiemann-Pick DiseasesMutationPedigreeMutation, MissenseAge of OnsetPoint MutationMolecular Sequence DataGenetic Association StudiesExonsPolymerase Chain ReactionPolymorphism, GeneticCodon, NonsenseAllelesHomozygoteGenetic VariationGenetic Predisposition to DiseaseBase SequenceSequence DeletionAmino Acid SequencePolymorphism, Single NucleotideGene FrequencySequence Analysis, DNAPhylogenyCase-Control StudiesPolymorphism, Restriction Fragment LengthHaplotypesHeterozygoteGenetic MarkersChromosome MappingModels, GeneticHepacivirus