¹ Laboratory of Clinical Age Immunology and Allergology, Russian Gerontological Research Center,
Pirogov Russian National Research Medical University, Moscow, Russia

² Research Institute for Arctic Medicine,
Northern State Medical University, Arkhangelsk, Russia

³ Research Institute of Hygiene and Health Protection of Children and Adolescents,
Scientific Center of Children’s Health of RAMS, Moscow, Russia

Correspondence should be addressed: Milushkina OYu
ul. Ostrovityanova, d. 1, Moscow, Russia, 117997; ur.umsr@o_anikhsulim