Injections, IntravenousInjectionsInjections, IntramuscularInjections, SubcutaneousInjections, IntralesionalInjections, Intra-ArticularInjections, IntraperitonealInjections, IntraventricularInjections, Intra-ArterialTime FactorsRats, Sprague-DawleyInjections, IntradermalInjections, EpiduralTissue DistributionRabbitsDisease Models, AnimalInjections, SpinalDose-Response Relationship, DrugIntravitreal InjectionsLiverInjections, JetRats, WistarInjections, IntraocularMice, Inbred C57BLRats, Inbred StrainsMicroinjectionsContrast MediaMice, Inbred BALB CKineticsFlow Injection AnalysisRadiopharmaceuticalsSpleenDogsBrainMetabolic Clearance RateIodine RadioisotopesKidneyGenetic TherapyGenetic VectorsSubstance Abuse, IntravenousHalf-LifeBlood PressureSperm Injections, IntracytoplasmicGene Transfer TechniquesLungAutoradiographySyringesNeoplasm TransplantationAnesthetics, LocalEndotoxinsTechnetiumNeedlesLidocaineAdenoviridaeAntibodies, MonoclonalCatsMice, Inbred StrainsMice, NudeRecombinant ProteinsCapillary PermeabilityLipopolysaccharidesLiposomesOrganotechnetium CompoundsCells, CulturedVitreous BodyMice, Inbred ICRTomography, Emission-Computed, Single-PhotonTreatment OutcomeHeart RateDextransPyrogensRadioisotopesTriamcinolone AcetonideBody TemperatureSheepRandom AllocationImmunohistochemistryMononuclear Phagocyte SystemCarbon RadioisotopesRNA, MessengerPainBlood-Brain BarrierTriamcinoloneFluorocarbonsTomography, Emission-ComputedNeoplasms, ExperimentalDrug CarriersOrganometallic CompoundsIndium RadioisotopesDrug Administration RoutesRats, Inbred LewAntibodiesPregnancyPolyethylene GlycolsNeuromuscular AgentsMicrospheresNeuronsBotulinum Toxins, Type ASwineBehavior, Animal