For citations:
Severskaya N.V., Ilyin A.A., Chebotareva I.V., Zhelonkina N.V., Isaev P.A., Polkin V.V., Ivanov S.A., Kaprin A.D. Calcitonin testing in patients with thyroid nodules for screening medullary thyroid carcinoma: a “gray zone”. Head and Neck Tumors (HNT). 2022;12(2):79-88. (In Russ.) https://doi.org/10.17650/2222-1468-2022-12-2-79-88