Age of OnsetAge FactorsHuntington DiseasePedigreeTrinucleotide RepeatsGenetic Predisposition to DiseaseGenotypeRetrospective StudiesFamily HealthRisk FactorsAnticipation, GeneticSex FactorsPhenotypeAllelesSpinocerebellar DegenerationsCohort StudiesGenetic LinkageTime FactorsMutationFollow-Up StudiesSchizophrenia, CatatonicPenetrancePrecipitating FactorsSeverity of Illness IndexPaternal AgeLod ScoreDisease ProgressionDiabetes Mellitus, Type 1Cerebellar AtaxiaParkinson DiseaseFamilySchizophrenia, DisorganizedGenetic HeterogeneityGene FrequencySchizophreniaAlzheimer DiseaseDNA Mutational AnalysisApolipoprotein E4Polymorphism, GeneticGenes, DominantDNA Repeat ExpansionProdromal SymptomsInfant, NewbornSchizophrenia, ChildhoodPrognosisGenetic Association StudiesPubertyIncidenceNuclear FamilyPolymorphism, Single NucleotideMenarcheCase-Control StudiesPsychotic DisordersFathersProspective StudiesPsychiatric Status Rating ScalesMachado-Joseph DiseaseHeterozygoteAge DistributionGenetic TestingMarijuana AbuseEpilepsyHaplotypesMagnetic Resonance ImagingSchizophrenia, ParanoidPrevalenceTreatment OutcomeSchizophrenic PsychologyParkinsonian DisordersLongitudinal StudiesCognitive ReserveSpinocerebellar AtaxiasItalySwedenGenetic MarkersDystoniaNorwayDiagnostic and Statistical Manual of Mental DisordersRiskChromosome MappingModels, GeneticFrontotemporal DementiaJapanAlcoholismStatistics, NonparametricChi-Square DistributionAtrophyOdds RatioBipolar DisorderPsychosurgeryRecurrenceMultiple SclerosisNeuropsychological TestsLegg-Calve-Perthes DiseaseApolipoproteins EFinlandArthritis, JuvenileEpilepsies, PartialMicrosatellite RepeatsComorbidity