Sensitivity and SpecificityClinical Laboratory TechniquesReagent Kits, DiagnosticBreath TestsFalse Positive ReactionsImmunologic TestsPoint-of-Care SystemsPredictive Value of TestsFalse Negative ReactionsDiagnostic Tests, RoutineReproducibility of ResultsModels, StatisticalEvaluation Studies as TopicModels, GeneticSerologic TestsBacteriological TechniquesEnzyme-Linked Immunosorbent AssayImmunoassayComplement Fixation TestsLikelihood FunctionsTime FactorsHemagglutination TestsMethodsAlgorithmsComputer SimulationROC CurveAntigens, BacterialData Interpretation, StatisticalImmunoenzyme TechniquesAntibodies, ViralGenetic MarkersAntibodies, BacterialMass ScreeningMycobacterium tuberculosisCarbon DioxideGenotypeFecesProspective StudiesGenetic LinkagePolymerase Chain ReactionHelicobacter InfectionsFluorescent Antibody TechniqueImmunoglobulin GPolymorphism, Single NucleotideCulture MediaExercise TestGene FrequencyBiological MarkersPregnancyRetrospective StudiesRisk FactorsPrognosis