DOI:
10.1055/s-00000020
Geburtshilfe und Frauenheilkunde
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References
Tucker KL, Rich S, Rosenberg I, Jacques P, Dallal G, Wilson PW, Selhub J.
Plasma vitamin B-12 concentrations relate to intake source in the Framingham Offspring study.
Am J Clin Nutr 2000; 71: 514-522
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