Diabetic NeuropathiesAutonomic Nervous System DiseasesHereditary Sensory and Autonomic NeuropathiesValsalva ManeuverAutonomic Nervous SystemPeripheral Nervous System DiseasesMiosisHypotension, OrthostaticGastroparesisPain Insensitivity, CongenitalDysautonomia, FamilialDiabetes Mellitus, Type 1Shy-Drager SyndromeSural NervePupil DisordersHeart RateSerine C-PalmitoyltransferaseHypohidrosisHereditary Sensory and Motor NeuropathyGastric EmptyingNeural ConductionParasympathetic Nervous SystemIritisParaneoplastic Syndromes, Nervous SystemMioticsSweat GlandsPupilPostureReflex, PupillaryNervous System DiseasesAmyloid Neuropathies, FamilialDiabetes Mellitus, Type 2Cardiovascular SystemPure Autonomic FailureDiabetes ComplicationsOptic Neuropathy, IschemicPancreatic PolypeptideGastrointestinal MotilitySweatingGallbladder EmptyingGanglia, AutonomicPolyneuropathiesHypoaldosteronismSelf MutilationAutonomic Fibers, PostganglionicBlood PressureAmyl NitriteElectrocardiographySympathetic Nervous SystemUlnar NeuropathiesCharcot-Marie-Tooth DiseaseDiabetes MellitusHypoglycemiaDiabetes Mellitus, ExperimentalConstipationHeartDiabetic NephropathiesReflexDeath, SuddenNeurologic ExaminationGastrointestinal TransitAlcoholic NeuropathyRespirationGanglia, SympatheticVagus NerveVibrationErectile DysfunctionAlbuminuriaHeart DiseasesFemoral NeuropathyHemoglobin A, GlycosylatedOptic Atrophy, Hereditary, LeberDiabetic AngiopathiesOptic Nerve DiseasesMedian NeuropathyGallbladderReference ValuesPeripheral NervesPedigreeAmyloid NeuropathiesBlood GlucoseCase-Control StudiesTime FactorsInsulinOptic Atrophies, HereditaryBaroreflexElectrocardiography, AmbulatoryCranial Nerve DiseasesSciatic NerveCardiovascular DiseasesDiarrheaUlnar Nerve Compression SyndromesPrevalenceAwarenessSeverity of Illness IndexElectrodiagnosisRisk FactorsDemyelinating DiseasesFollow-Up StudiesDiagnostic Techniques, Neurological