SulfonesCanadaPurinesPiperazinesPhosphodiesterase InhibitorsPhosphodiesterase 5 Inhibitors3',5'-Cyclic-GMP PhosphodiesterasesErectile DysfunctionElectric StimulationCyclic Nucleotide Phosphodiesterases, Type 5Penile ErectionHomosexuality, MaleVasodilator AgentsMethamphetamineElectric Stimulation TherapyCyclic GMPOntarioStimulation, ChemicalGeorgiaDeep Brain StimulationPhysical StimulationBritish ColumbiaAlbertaTranscranial Magnetic StimulationQuebecManitobaUnsafe SexTime FactorsNova ScotiaRisk-TakingCells, CulturedNorthwest TerritoriesSexual BehaviorArctic RegionsSaskatchewanNunavutInuitsTranscutaneous Electric Nerve StimulationCatsSignal TransductionNewfoundland and LabradorCalciumRats, Sprague-DawleyIndians, North AmericanElectrodes, ImplantedMuscle ContractionPhotic StimulationCell LineAction PotentialsDose-Response Relationship, DrugAmerican Native Continental Ancestry GroupPhosphorylationVagus NerveEnzyme ActivationAcoustic StimulationKineticsQuestionnairesEvoked PotentialsSocieties, MedicalNew BrunswickLymphocyte ActivationNeuronsEvoked Potentials, MotorYukon TerritoryRNA, MessengerMolecular Sequence DataMedical TourismIsoproterenolCyclic AMPPrince Edward IslandRats, WistarReflexRisk FactorsNational Health ProgramsDogsAtropineNorepinephrineSynaptic TransmissionElectromyographyMotor CortexSubthalamic NucleusAfferent PathwaysElectrophysiologyHealth SurveysSympathetic Nervous SystemMice, Inbred C57BLPrevalenceTreatment OutcomeAge FactorsNeural InhibitionGuinea PigsSelf StimulationPregnancyRabbitsAnalysis of VarianceGene Expression RegulationCattleNeurons, AfferentEnzyme InhibitorsMuscle, Skeletal