1. Stavropol Medical University
2. P. Hertsen Moscow Oncology Research Institute – branch of the National Medical Research Radiological Centre of the Ministry of Health of Russia; I.M. Sechenov First Moscow State Medical University, Ministry of Health of Russia
3. Kazan State Medical Academy – branch of Federal State Budgetary Educational Institution of Higher Professional Education of Russian Medical Academy of Postgraduate Education of Ministry of Health of Russia; Republican Clinical Сancer Center named after prof. M. Z. Sigal
4. Rostov Research Institute of Oncology, Ministry of Health of Russia