Arterial Occlusive DiseasesPeripheral Arterial DiseasePeripheral Vascular DiseasesIntermittent ClaudicationAnkle Brachial IndexAnkleOcclusive DressingsLegLower ExtremityFemoral ArteryIschemiaIliac ArteryTibial ArteriesBrachial ArteryPopliteal ArteryIntracranial Arterial DiseasesAmputationRisk FactorsVascular PatencyVascular DiseasesVascular Surgical ProceduresConstriction, PathologicThromboangiitis ObliteransWalkingAngiographyAngioplasty, BalloonAorta, AbdominalAortic DiseasesToesArteriosclerosisLimb SalvageProspective StudiesTreatment Outcome