PainChronic PainPain ManagementPain ThresholdMolecular Sequence DataPain, PostoperativeLow Back PainBack PainPain MeasurementAbdominal PainNeck PainPain, IntractableAmino Acid SequencePelvic PainPain PerceptionSpecies SpecificityFacial PainBase SequenceAcute PainPain, ReferredKineticsGene Expression ProfilingSequence Analysis, DNAMolecular WeightShoulder PainMusculoskeletal PainPhylogenyElectrophoresis, Polyacrylamide GelCell LineBinding SitesTime FactorsDNA, BacterialMutationCloning, MolecularCattleHydrogen-Ion ConcentrationOligonucleotide Array Sequence AnalysisCluster AnalysisBacterial ProteinsSequence Homology, Amino AcidRNA, Ribosomal, 16SSequence AlignmentIsoenzymesRecombinant ProteinsModels, MolecularPolymerase Chain ReactionAmino AcidsAnalgesicsRNA, MessengerCells, CulturedModels, BiologicalPhenotypeSwineNociceptive PainNeuralgiaSubstrate SpecificityEscherichia coliStructure-Activity RelationshipLiverTemperatureTranscription, GeneticImmunohistochemistryMicroscopy, ElectronTumor Cells, CulturedGene ExpressionProtein ConformationGene Expression RegulationAnalgesics, OpioidDNASignal TransductionProtein BindingMyofascial Pain SyndromesHyperalgesiaComplex Regional Pain SyndromesChronic DiseaseVisceral PainArthralgiaAnalgesiaLabor PainTreatment OutcomeNociceptorsFibromyalgiaQuestionnairesAnesthetics, LocalDisability EvaluationCatastrophizationFlank PainEye PainProspective StudiesMorphineDouble-Blind MethodAnalgesics, Non-NarcoticSeverity of Illness IndexInjections, SpinalSciaticaToothacheLidocaineNerve BlockOsteoarthritis, KneeQuality of Life