V. E. Oleynikov
Penza State University
В. А. Буданова
E. I. Yastrebova
S. S. Fadeeva
Н. А. Борисова
L. I. Gusakovskaya
I. Matrosova
National Research Center for Preventive Medicine
North-Eastern Federal University
City Children's Hospital No. 22
Saint Petersburg State Pediatric Medical University
Bashkir State Medical University
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