Serum vitamin B 12 concentrations in the general population: a ten-year follow-up.
D000328:Adult; D000367:Age Factors; D001681:Biological Assay; D005055:Euglena / Q000378:metabolism; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D008906:Mining; D009026:Mortality; D011159:Population Surveillance; D014805:Vitamin B 12 / Q000097:blood*; D014852:Wales
D014805:Vitamin B 12