Sensitivity and SpecificityFalse Positive ReactionsFalse Negative ReactionsPredictive Value of TestsReagent StripsDiagnostic Tests, RoutineReagent Kits, DiagnosticLatex Fixation TestsMass ScreeningSkin TestsProspective StudiesEvaluation Studies as TopicEnzyme-Linked Immunosorbent AssayReproducibility of ResultsExercise TestPrevalenceRisk FactorsTime FactorsCross-Sectional StudiesBiological MarkersFollow-Up StudiesHIV InfectionsInfant, NewbornPrognosisRetrospective Studies