L.F. VAKHITOVA1, F.M. KAZAKOVA2, G.F. ABDULMYANOVA2, F.A. ISHKINA2 1Kazan State Medical University of the Ministry of Health of the Russian Federation, Kazan 2Children’s Republic Clinical Hospital, Kazan Contact: Vakhitova L.F. ― PhD (medicine), Assistant of the Department of Hospital Pediatrics Address: 49 Butlerov Str., Kazan, Russian Federation, 420012, tel. +7-903-342-03-97, e-mail: vlilija@mail.ru In recent years, […]