a non-absorbable tracer , 51cr-chromic chloride , was administered firstly with 58co-labelled vitamin b12 and then three hours later with 57co-labelled vitamin b12 and then three hours later with 57co-labelled vitamin b12 plus 50 mg hog intrinsic factor which normalises b12 malabsorption in patients with pernicious anaemia .
C0042845
vitamin b12
C0002892
pernicious anaemia