O.I. PIKUZA, R.A. FAYZULLINA, A. M. ZAKIROVA, E.A. SAMORODNOVA Kazan State Medical University of the Ministry of Health of Russia, Kazan  Contact details: Zakirova A.M. — PhD (medicine), Associate Professor of the Department of Propedeutics of Childhood Diseases and Faculty Pediatrics Address: 49 Butlerov St., Kazan, Russian Federation, 420012, tel.: +7-9270-33-93-41, e-mail: azakirova@gmail.com  The purpose […]