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22. A population-based intervention study on elevated serum levels of methylmalonic acid and total homocysteine in elderly people: results after 36 months of follow-up. Björkegren K, Svärdsudd K. J Intern Med; 2004 Nov; 256(5):446-52. PubMed ID: 15485481 [Abstract] [Full Text] [Related]
33. [Biological markers for the status of vitamins B12 and D: the importance of some analytical aspects in relation to clinical interpretation of results]. Boulat O, Rey F, Mooser V. Rev Med Suisse; 2012 Oct 31; 8(360):2052-4, 2056-8. PubMed ID: 23185926 [Abstract] [Full Text] [Related]