Comparative analysis of variants of surgical approach in treatment of thymic tumors (meta-analysis) - I. V. Dmitrochenko; I. I. Dzidzava; B. N. Kotiv; E. E. Fufaev; D. A. Yasyuchenya; A. P. Chuprina; O. V. Barinov; A. P. Leonovich; L. N. Bisenkov; S. A. Shalaev (Вестник хирургии имени И.И. Грекова)