GastritisGefarnateMetaplasiaStomach UlcerGastritis, AtrophicGastrointestinal HemorrhageHelicobacter pyloriGastric MucosaHelicobacter InfectionsStomach NeoplasmsPyloric AntrumGastritis, HypertrophicStomachGastroscopyPepsinogen AEarly Detection of CancerAchlorhydriaBile RefluxGastrinsPepsinogen CPeptic UlcerBiopsyStomach DiseasesDuodenal UlcerProstatic NeoplasmsPrecancerous ConditionsChronic DiseaseOvarian NeoplasmsHelicobacter felisBreast NeoplasmsHelicobacter heilmanniiParietal Cells, GastricLung NeoplasmsAnemia, PerniciousDuodenitisColonic NeoplasmsDyspepsiaHelicobacterNeoplasm MetastasisNeoplasm InvasivenessPepsinogensPancreatic NeoplasmsUreaseGastric JuicePostgastrectomy SyndromesMice, NudeNeoplasmsGene Expression Regulation, NeoplasticCancer VaccinesEndoscopy, GastrointestinalFollow-Up StudiesProspective StudiesRetrospective StudiesGenetic Predisposition to DiseaseNeoplasm ProteinsReverse Transcriptase Polymerase Chain ReactionDisease ProgressionCarcinomaPrognosisEndoscopyUterine Cervical NeoplasmsRNA, MessengerSurvival Analysis