Vitamin B12 studies after gastrectomy.
D005743:Gastrectomy; D006397:Hematinics; D006801:Humans; D011178:Postgastrectomy Syndromes; D014805:Vitamin B 12; D014806:Vitamin B 12 Deficiency
D006397:Hematinics; D014805:Vitamin B 12
POSTGASTRECTOMY SYNDROMES; VITAMIN B 12 DEFICIENCY