[Change in the vitamin B12 level in the blood in certain stomach diseases].
D006801:Humans; D013272:Stomach Diseases / Q000097:blood*; D014805:Vitamin B 12 / Q000097:blood*
D014805:Vitamin B 12
Izmenenie soderzhaniia vitamina B12 v krovi pri nekotorykh zabolevaniiakh zheludka.