Occult BloodHematologic TestsGuaiacColonoscopyMass ScreeningSigmoidoscopyColorectal NeoplasmsBlood PressureEarly Detection of CancerHypertensionSensitivity and SpecificityImmunochemistryEnemaBarium SulfateUnnecessary ProceduresDiagnostic Tests, RoutinePredictive Value of TestsRisk FactorsTime FactorsAdenomaPrehypertensionReagent Kits, DiagnosticProspective StudiesReference ValuesBlood GlucoseHemoglobinsRetrospective StudiesBlood DonorsBlood Cell CountBlood CellsTransketolaseColonic PolypsAntihypertensive AgentsColonography, Computed TomographicFollow-Up StudiesErythrocytesMelenaImmunologic TestsPrevalenceBlood Flow VelocityHypotensionLeukocytesFecesPatient Acceptance of Health CareBlood VesselsPoint-of-Care SystemsBiological MarkersTreatment OutcomePeptidyl-Dipeptidase ALymphocytesDoping in SportsIndicators and ReagentsHypertension, RenalPostal ServiceFalse Positive ReactionsBlood VolumeLiver Function TestsNeoplastic Cells, CirculatingCohort StudiesTuberculin TestGastrointestinal HemorrhageLeukemia, Lymphocytic, Chronic, B-CellSystoleDogsPatient ComplianceBone MarrowEndoscopy, GastrointestinalBlood Chemical AnalysisMice, KnockoutRegional Blood FlowPregnancyPrognosisBreath TestsCase-Control StudiesKidneyHeart RateQuestionnairesDiagnostic ErrorsBlood SedimentationCross-Sectional StudiesPractice Guidelines as TopicB-LymphocytesFamily PracticeROC CurveReninInfant, NewbornLeukemiaLiverColonic NeoplasmsImmunohistochemistryLeukemia, LymphoidFalse Negative ReactionsBlood CoagulationReproducibility of ResultsHealth Knowledge, Attitudes, PracticePathology, ClinicalCell SeparationInsulinLeukocyte CountArteries