Intrinsic FactorCobalt IsotopesAnemia, PerniciousAnemiaVitamin B 12TranscobalaminsGastric JuiceSchilling TestCobalt RadioisotopesAnemia, MegaloblasticParietal Cells, GastricAnemia, MacrocyticAnemia, AplasticVitamin B 12 DeficiencyAnemia, HemolyticFactor IXaMalabsorption SyndromesCobamidesFanconi AnemiaHydroxocobalaminIntestinal SecretionsAnemia, Hemolytic, AutoimmuneCharcoalChief Cells, GastricAnemia, HypochromicFactor VIIIaMethodsIntestinal AbsorptionGastric FundusFactor XIleumGastric MucosaAnemia, Sickle CellAnemia, Sideroblastic