Circle of WillisDNA, CircularManagement Quality CirclesSpheroids, CellularMicrospheresLatexNamibiaNeoplastic Stem CellsNanospheresDNA ReplicationPerceptual ClosurePhantoms, ImagingMicroscopy, ElectronNucleic Acid Amplification TechniquesGene Rearrangement, T-LymphocyteNucleic Acid ConformationImaging, Three-DimensionalBase SequencePlasmidsDNA, ViralOrbital ImplantsDNA, Single-StrandedCerebral ArteriesMolecular Sequence DataPrimed In Situ LabelingParticle SizeScattering, RadiationImage Processing, Computer-AssistedForm PerceptionDNA, SuperhelicalModels, BiologicalMathematicsModels, TheoreticalAnesthesia, Closed-CircuitThymus GlandModels, MolecularComputer SimulationPolystyrenesAlgorithmsMicroscopy, Electron, ScanningRecombination, GeneticBacteriophage phi X 174Side-Population CellsCollateral CirculationViscosityModels, StructuralCiliary ArteriesGestalt TheoryReproducibility of ResultsEye, ArtificialEscherichia coliNestinStem CellsNotophthalmus viridescensHolmiumDoppler EffectCell Culture TechniquesDNAModels, ChemicalHIV Long Terminal RepeatWaterCell DifferentiationHandwritingNucleic Acid RenaturationMagnetic Resonance AngiographyDNA, CatenatedNucleic Acid DenaturationDNA NucleotidyltransferasesDescemet MembraneTime FactorsRepetitive Sequences, Nucleic AcidCell ProliferationTelomereSolar SystemTransposasesKluyveromycesSuspensionsVirus IntegrationKineticsBiophysicsMagnetsMutationBinding SitesReaginsBiophysical PhenomenaAntigens, CD24Virus ReplicationMovementNebraskaRNANeuroendoscopyRadiometryColloidsMyopiaCarotid Artery, InternalOrientationPhotic StimulationProtein ConformationStars, CelestialSize Perception