T. V. Prokofyeva
Astrakhan State Medical University
Russian Federation

Tatiana V. Prokofyeva – Cand. Sc. (Med.), Associate Professor at the Department of Internal Diseases of Pediatric Faculty

Bakinskaya str. 121, Astrakhan 414000, Russian Federation 

O. S. Polunina
Astrakhan State Medical University
Russian Federation

Olga S. Polunina – Dr. Sc. (Med.), Professor, Head of the Department of Internal Diseases of Pediatric Faculty 

Bakinskaya str. 121, Astrakhan 414000, Russian Federation 

L. P. Voronina
Astrakhan State Medical University
Russian Federation

Ludmila P. Voronina – Dr. Sc. (Med.), Professor at the Department of Internal Diseases of Pediatric Faculty 

Bakinskaya str. 121, Astrakhan 414000, Russian Federation 

E. A. Polunina
Astrakhan State Medical University
Russian Federation

Ekaterina A. Polunina – Dr. Sc. (Med.), Associate Professor at the Department of Internal Diseases of Pediatric Faculty 

Bakinskaya str. 121, Astrakhan 414000, Russian Federation 

I. V. Sevostyanova
Astrakhan State Medical University
Russian Federation

Irina V. Sevostyanova – Cand. Sc. (Med.), Associate Professor at the Department of Internal Diseases of Pediatric Faculty 

Bakinskaya str. 121, Astrakhan 414000, Russian Federation