[B 12 values in the serum of patients with gastric resection].
D005743:Gastrectomy / Q000009:adverse effects*; D006801:Humans; D014805:Vitamin B 12 / Q000097:blood* / Q000627:therapeutic use; D014806:Vitamin B 12 Deficiency / Q000209:etiology* / Q000517:prevention & control
D014805:Vitamin B 12
Serum-B 12 i et ventrikkelresesert materiale.