I.P. Butkevich - Dr.Sc. (Biol.), Leading Research Scientist, I.P. Pavlov Institute of Physiology RAS, Saint-Petersburg, Russia. E-mail: irinabutkevich@yandex.ru V.A. Mikhailenko - Ph.D. (Biol.), Senior Research Scientist, I.P. Pavlov Institute of Physiology RAS, Saint-Petersburg, Russia. E-mail: viktormikhailenko@yandex.ru Т.N. Shimaraeva - Ph.D. (Biol.), Associate Professor, Pediatric Medical University, Saint-Petersburg, Russia. E-mail: 3706381@mail.ru