SalivaIntestinal MucosaGastric MucosaMouth MucosaSaliva, ArtificialNasal MucosaSalivary Proteins and PeptidesSalivationMucous MembraneParotid GlandSalivary GlandsOlfactory MucosaMouthColonLaryngeal MucosaSubmandibular GlandImmunoglobulin A, SecretoryXerostomiaSublingual GlandStreptococcus mutansDuodenumDental PlaqueIntestine, SmallGastritisDental PellicleStomachImmunoglobulin AStomach UlcerMouth NeoplasmsDental CariesEsophagusIleumHelicobacter pyloriSecretory RateMucinsActinomycesHistatinsMucin-5BHelicobacter InfectionsPyloric AntrumProline-Rich Protein DomainsCheekMetaplasiaTongueBiopsyGastric JuiceMouthwashesImmunity, MucosalColitis, Ulcerative