M.A. KAZAKOVA, R.A. PHAYZULLINA Kazan State Medical University, 49 Butlerov Str., Kazan, Russian Federation, 420012  Kazakova M.A. ― postgraduate student of the Department of propaedeutics of children’s diseases and theoretical pediatrics with the course of childhood diseases of the medical faculty, tel. +7-906-111-15-88, e-mail: ku4umovamarija@gmail.com Phayzullina R.A. ― D. Med. Sc., Professor, Head of the […]