Intrinsic FactorCobalt IsotopesAnemia, PerniciousStomachVitamin B 12TranscobalaminsGastric JuiceSchilling TestCobalt RadioisotopesParietal Cells, GastricAnemia, MegaloblasticVitamin B 12 DeficiencyFactor IXaStomach NeoplasmsCobamidesMalabsorption SyndromesGastric MucosaIntestinal SecretionsHydroxocobalaminGastric FundusChief Cells, GastricCharcoalAnemia, MacrocyticFactor VIIIaIntestinal AbsorptionMethodsIleumStomach DiseasesFactor X