For citations:
Cherepanova V.V., Sidnev G.V., Konyshkina T.M., Borisov V.I., Moiseenko N.B. Diagnostic errors and treatment of anemia caused by vitamin B12 deficiency. Oncohematology. 2024;19(1):70-82. (In Russ.) https://doi.org/10.17650/1818-8346-2024-19-1-70-82