J. A. Kandrashkina
Penza Institute of Advanced Medical Training; Penza State University
Russian Federation

Postgraduate Student of the Department of Allergology and Immunology, 8a, Stasov St., Penza, 440066;

Assistant of the Department of Obstetrics and Gynecology, 40, Krasnaya St., Penza, 440026

E. A. Orlova
Penza Institute of Advanced Medical Training
Russian Federation

Dr. Sci. (Med.), Professor of the Department of Allergology and Immunology, 

8a, Stasov St., Penza, 440066

A. F. Shtakh
Penza State University
Russian Federation

Cand. Sci. (Med.), Associate Professor, Head of the Department of Obstetrics and Gynecology,

40, Krasnaya St., Penza, 440026