title: Plasma radioactivity following simultaneous oral administration of intrinsic factor-bound and free radioactsis  agammaglobulinemia immunology immunologic deficiency syndromes immunology  iga igm intestinal mucosa immunology antibody foive vitamin B 12 .
mesh_terms: D000284:Administration, Oral; D000328:Adult; D000368:Aged; D000752:Anemia, Pernicious / Q000175:diagnosis*; D003036:Cobalt Isotopes; D005260:Female; D005750:Gastric Juice; D006801:Humans; D007437:Intrinsic Factor / Q000008:administration & dosage*; D008297:Male; D008875:Middle Aged; D014805:Vitamin B 12 / Q000008:administration & dosage*
chemical_list: D003036:Cobalt Isotopes; D007437:Intrinsic Factor; D014805:Vitamin B 12