D. A. Bereznikova
Kursk State Medical University, Ministry of Health of Russia; G.E. Ostroverkhov Kursk Cancer Research and Clinical Center
Russian Federation

Darya A. Bereznikova, Postgraduate, Department of Oncology; Oncologist, Outpatient Cancer Care Center 

3, Karl Marx St., Kursk, 305004;
1, Eliseeva St., Kursk, 305524

U. S. Stanoevich
Kursk State Medical University, Ministry of Health of Russia; G.E. Ostroverkhov Kursk Cancer Research and Clinical Center
Russian Federation

Uglesha S. Stanoevich, MD, DSc, Professor, Head of the Department of Oncology; Head Physician 

3, Karl Marx St., Kursk, 305004;
1, Eliseeva St., Kursk, 305524