DipyridamoleAbsorptionIntestinal AbsorptionDilazepAdenosineVasodilator AgentsThioinosineThallium RadioisotopesCoronary CirculationEquilibrative-Nucleoside Transporter 2NucleosidesEquilibrative Nucleoside Transporter 1AspirinSkin AbsorptionCoronary DiseaseNitrogen RadioisotopesBiological AvailabilityExercise TestTheophyllineTechnetium Tc 99m SestamibiThalliumHeartNucleoside Transport ProteinsTomography, Emission-Computed, Single-PhotonDobutamineTomography, Emission-ComputedPlatelet Aggregation InhibitorsSpectrophotometry, AtomicX-Ray Absorption SpectroscopyJejunumSulfinpyrazoneBiological TransportPhosphodiesterase InhibitorsAdministration, OralRubidium RadioisotopesEchocardiography, StressSpectrophotometryHyperemiaIronEchocardiographyLidoflazineEquilibrative Nucleoside Transport ProteinsInosine2-ChloroadenosineSensitivity and SpecificitySpectrum AnalysisDogsIntestine, SmallHypoxanthineIleum