Don't ignore low serum cobalamin (vitamin B12) levels.
Herbert
V
V
D000368:Aged; D000752:Anemia, Pernicious / Q000097:blood / Q000175:diagnosis*; D006801:Humans; D008875:Middle Aged; D014805:Vitamin B 12 / Q000097:blood*; D014806:Vitamin B 12 Deficiency / Q000097:blood / Q000175:diagnosis
D014805:Vitamin B 12