L. N. Aftaeva
Penza State University
Russian Federation

Larisa N. Aftaeva, candidate of medical sciences

V. L. Mel’nikov
Penza State University
Russian Federation

Viktor L. Mel’nikov, doctor of medical sciences

S. V. Votolkina
Penza State University
Russian Federation

Svetlana V. Votolkina

A. R. Sudapina
Penza State University
Russian Federation

Alina R. Sudapina

M. V. Nikol’skaya
Penza State University
Russian Federation

Marina V. Nikol’skaya, candidate of medical sciences