Vascular DiseasesHyperhomocysteinemiaVitamin B 12Folic AcidPeripheral Vascular DiseasesHomocystineCystathionine beta-SynthaseMethylenetetrahydrofolate Reductase (NADPH2)MethionineVitamin B 6Vitamin B ComplexBetaine-Homocysteine S-Methyltransferase5-Methyltetrahydrofolate-Homocysteine S-MethyltransferaseCystathionineOxidoreductases Acting on CH-NH Group DonorsHomocystinuriaS-AdenosylhomocysteineRisk FactorsVitamin B 12 DeficiencyFolic Acid DeficiencyCollagen DiseasesArteriosclerosisPyridoxineEndothelium, VascularCardiovascular DiseasesMethylmalonic AcidAtherosclerosisBetaineS-Adenosylmethionine5,10-Methylenetetrahydrofolate Reductase (FADH2)HomocysteineHomocysteine S-MethyltransferaseBiological MarkersMuscle, Smooth, VascularDiabetic AngiopathiesDietary SupplementsCerebrovascular DisordersGlycine N-MethyltransferaseTetrahydrofolatesCysteineCase-Control StudiesGenotypeAdenosylhomocysteinaseProspective StudiesStrokeTime FactorsCells, CulturedVitamin B DeficiencyTranscobalaminsThrombosisAmputationPolymorphism, GeneticCoronary DiseaseCarotid ArteriesVitamin B 6 DeficiencyAortaIschemiaBlood VesselsMyocytes, Smooth MuscleTunica IntimaEndothelial CellsReference ValuesArterial Occlusive DiseasesOxidative StressSarcosineMethylationCohort StudiesCystathionine gamma-LyaseFastingDementia, VascularBrachial ArteryHypertensionFollow-Up StudiesHypertension, PulmonaryDietKidney Failure, ChronicLipoprotein(a)Coronary Artery DiseaseCreatinineCarotid Artery DiseasesPyridoxal PhosphateLegCross-Sectional StudiesLipotropic AgentsDose-Response Relationship, DrugIntermittent ClaudicationNeural Tube DefectsLipidsFemoral ArteryArteriesNitric OxideAge FactorsC-Reactive ProteinBlood PressureDouble-Blind MethodDiabetes MellitusRenal DialysisDiabetes ComplicationsRisk AssessmentAnalysis of Variance