Sural NerveBiopsyPeripheral Nervous System DiseasesHereditary Sensory and Motor NeuropathyPolyradiculoneuropathyPolyneuropathiesNeural ConductionCharcot-Marie-Tooth DiseasePeripheral NervesPolyradiculoneuropathy, Chronic Inflammatory DemyelinatingDemyelinating DiseasesCerebrospinal Fluid ProteinsNerve Fibers, MyelinatedPeroneal NeuropathiesMotor Neuron DiseasePeroneal NerveDiscriminant AnalysisSpinal NervesBiopsy, NeedleNeuritisTibial NerveDiabetic NeuropathiesMicroscopy, ElectronSciatic NerveNerve FibersAmyloid NeuropathiesParesthesiaPedigree