Vitamin B12 deficiency.
Naylor
C David
CD
D000284:Administration, Oral; D000368:Aged; D006801:Humans; D007267:Injections / Q000009:adverse effects; D011320:Primary Health Care; D014805:Vitamin B 12 / Q000008:administration & dosage*; D014806:Vitamin B 12 Deficiency / Q000188:drug therapy*
D014805:Vitamin B 12