A. V. Nalyotov
M. Gorky Donetsk National Medical University
Russian Federation

Andrew V. Nalyotov, MD, PhD, DSc, Professor, Head of the Department of Pediatrics no. 2 

 16 Illich avе., Donetsk, Donetsk People`s Republic, 283003, Russia 

L. F. Chalaya
M. Gorky Donetsk National Medical University
Russian Federation

 Lubov F. Chalaya, MD, Associate Professor of the Department of Pediatrics no. 2

 16 Illich avе., Donetsk, Donetsk People`s Republic, 283003, Russia 

O. N. Moskaljuk
M. Gorky Donetsk National Medical University
Russian Federation

Oksana N. Moskaljuk, MD, Associate Professor of the Department of Propaedeutics of Pediatrics

ORCID: 0000–0003–4857–9856 

16 Illich avе., Donetsk, Donetsk People`s Republic, 283003, Russia 

R. F. Mahmutov
M. Gorky Donetsk National Medical University
Russian Federation

Ravil F. Mahmutov, MD, PhD, DSc, Associate Professor, Associate Professor of the Department of Pediatrics no. 2

 16 Illich avе., Donetsk, Donetsk People`s Republic, 283003, Russia 

D. I. Masyuta
M. Gorky Donetsk National Medical University
Russian Federation

Dmitry I. Masyuta, MD, Associate Professor of the Department of Pediatrics no. 2

16 Illich avе., Donetsk, Donetsk People`s Republic, 283003, Russia