D. P. Yashina
Kazan State Medical Academy – branch of the Russian Medical Academy of Continuing Professional Education, Ministry of Health of Russia; Republican Clinical Oncological Dispansary, Ministry of Health of Republic of Tatarstan
Russian Federation

Darya P. Yashina - Department of Oncology, Radiology and Palliative Medicine, Kazan State Medical Academy – branch of the Russian Medical Academy of Continuing Professional Education, Ministry of Health of Russia.

36 Butlerova St., Kazan 420012, Republic of Tatarstan; 29 Sibirskii Tract, Kazan 420029, Republic of Tatarstan

Z. A. Afanasyeva
Kazan State Medical Academy – branch of the Russian Medical Academy of Continuing Professional Education, Ministry of Health of Russia; Republican Clinical Oncological Dispansary, Ministry of Health of Republic of Tatarstan
Russian Federation

Department of Oncology, Radiology and Palliative Medicine, Kazan State Medical Academy – branch of the Russian Medical Academy of Continuing Professional Education, Ministry of Health of Russia.

36 Butlerova St., Kazan 420012, Republic of Tatarstan; 29 Sibirskii Tract, Kazan 420029, Republic of Tatarstan