Cerebral Small Vessel DiseasesLeukoaraiosisCerebral Arterial DiseasesBrain InfarctionStroke, LacunarLeukoencephalopathiesDementia, VascularCerebrovascular DisordersMagnetic Resonance ImagingMicrovesselsBrainNerve Fibers, MyelinatedPeripheral Arterial DiseaseCerebrovascular CirculationStrokeCADASILVenulesCognition DisordersCerebral ArteriesPeripheral Vascular DiseasesRisk FactorsProspective StudiesImage Processing, Computer-AssistedCerebral InfarctionNetherlandsCohort StudiesDementia, Multi-InfarctBrain IschemiaBasal Ganglia Cerebrovascular DiseaseIntermittent ClaudicationCerebral HemorrhageCerebral PalsyBlood Vessels