Nasal MucosaRespiratory MucosaAdenoidsMucous MembraneOlfactory MucosaMucociliary ClearanceRespiratory SystemMicroscopy, Electron, ScanningBacterial AdhesionAdministration, IntranasalHaemophilus influenzaeOrgan Culture TechniquesIntestinal MucosaGastric MucosaMouth MucosaDelayed DiagnosisPrenatal DiagnosisEarly DiagnosisSensitivity and SpecificityDiagnosisBiopsyRetrospective StudiesColonLaryngeal MucosaDiagnostic ErrorsTomography, X-Ray ComputedDuodenumTime FactorsNursing DiagnosisPredictive Value of TestsDiagnosis, Computer-AssistedReproducibility of ResultsProspective StudiesPolymerase Chain ReactionPrognosisPreimplantation DiagnosisTreatment OutcomeFollow-Up StudiesIntestine, SmallImmunohistochemistryRisk FactorsGastritisInfant, NewbornMagnetic Resonance ImagingPregnancyFatal OutcomeBiopsy, NeedleStomach UlcerEsophagusCase-Control StudiesIleumStomachCeliac DiseaseColitis, UlcerativeFetal DiseasesStomach NeoplasmsTumor Markers, BiologicalCohort StudiesIncidenceHelicobacter pyloriMetaplasiaBiological MarkersAge FactorsStomach DiseasesPrecancerous Conditions