Serum Vitamin B12 Concentrations of Patients with Megaloblastic Anaemia After Treatment with Vitamin B12, Folic Acid, or Folinic AcidBr Med J 1953; 2 doi: https://doi.org/10.1136/bmj.2.4837.640 (Published 19 September 1953) Cite this as: Br Med J 1953;2:640
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