Spinal Cord DiseasesSpinal StenosisSpinal CordLumbar VertebraeDecompression, SurgicalLaminectomySpinal Cord InjuriesSpinal CanalLumbosacral RegionRadiculopathySpondylolisthesisLigamentum FlavumSpinal FusionInjections, EpiduralCarotid StenosisAortic Valve StenosisSpinal Nerve RootsIntermittent ClaudicationPolyradiculopathySciaticaPain MeasurementSpondylosisDisability EvaluationMyelographySpinal Cord CompressionCoronary StenosisLow Back PainCauda EquinaProstheses and ImplantsNeurosurgical ProceduresIntervertebral Disc DisplacementTreatment OutcomeTracheal StenosisSpinal Diseases