MicrocirculationLaser-Doppler FlowmetrySkinMicroscopic AngioscopyIontophoresisRegional Blood FlowSkin AgingArteriolesSkin DiseasesSkin NeoplasmsMouth FloorCapillariesCheekVenulesMicrovesselsMicroscopy, VideoLeukocytesBlood Flow VelocityLiver CirculationSkin Physiological PhenomenaSkin TestsVasodilationSkin AbsorptionSplanchnic CirculationCoronary CirculationSkin PigmentationAcridine OrangeEndothelium, VascularRetinal VesselsVasodilator AgentsMesocricetus