O.I. PIKUZA, Z.I. SULEYMANOVA, A.M. ZAKIROVA Kazan State Medical University of the Ministry of Health of the Russian Federation, Kazan  Contact details: Suleymanova Z.Y. — Ph. D. (medicine), Associate Professor of the Department of Propaedeutics of Children’s Diseases and Faculty Pediatrics Address: 36 Butlerov St., Kazan, Russian Federation, 420012, tel.: +7-987-296-38-48, e-mail: suleimanova_zulfia@mail.ru  The purpose […]