Spurious results of Schilling Tests with Frosst intrinsic factor.
D002214:Capsules; D003951:Diagnostic Errors; D006801:Humans; D007437:Intrinsic Factor / Q000008:administration & dosage; D012546:Schilling Test / Q000379:methods / Q000592:standards*
D002214:Capsules; D007437:Intrinsic Factor