Genetic Diseases, InbornNephritis, HereditaryMutationTrinucleotide RepeatsGenetic TestingPedigreeGenetic Predisposition to DiseaseDNA Mutational AnalysisPhenotypeChromosome MappingMolecular Sequence DataDNA RepairDNABase SequenceAmino Acid SequenceSpinocerebellar DegenerationsCerebellar AtaxiaOrphan Drug ProductionRare DiseasesFriedreich AtaxiaSpinocerebellar AtaxiasAtaxia