N. A. Kloktunova
Saratov State Medical University named after V.I. Razumovsky
Russian Federation

Natalya A. Kloktunova – Cand. Sci. (Sociology), Assoc. Prof. 

Address: 112, Bolshaya Kazachia str., Saratov, 410012

S. V. Venig
National Research Saratov State University
Russian Federation

Sergey B. Venig – Dr. Sci. (Phys.-Math), Prof. 

Address: 83, Astrakhanskaya str., Saratov, 410012

V. A. Solovyova
National Research Saratov State University
Russian Federation

Valentina A. Solovyova – Postgraduate Student. 

Address: 83, Astrakhanskaya str., Saratov, 410012