Failed Schilling tests.
D000284:Administration, Oral; D000748:Anemia, Macrocytic / Q000378:metabolism; D003037:Cobalt Radioisotopes; D006801:Humans; D007408:Intestinal Absorption; D012546:Schilling Test; D013997:Time Factors; D014805:Vitamin B 12 / Q000008:administration & dosage / Q000097:blood / Q000378:metabolism* / Q000652:urine
D003037:Cobalt Radioisotopes; D014805:Vitamin B 12