[Determination of serum vitamin B 12. Apropos of 355 determinations in an unselected hospital population in Barcelona].
D000704:Analysis of Variance; D001681:Biological Assay; D006801:Humans; D007778:Lactobacillus / Q000187:drug effects*; D013030:Spain; D014805:Vitamin B 12 / Q000097:blood*; D014806:Vitamin B 12 Deficiency / Q000453:epidemiology
D014805:Vitamin B 12
Dosificación de vitamina B 12  sérica. A propósito de 355 determinaciones en una problación hospitalaria de Barcelona, no seleccionada.