E.P. ZUBOVA, N.N. NASYBULLINA, G.M. KHUZIEVA, M.M. SADYKOV Children’s polyclinic № 9, Kazan Ministry of Health of the Republic of Tatarstan, Kazan Kazan State Medical Academy Kazan State Medical University Sadykov Marat Madaristovich Doctor of Medical Science, Chief Physician of children’s polyclinic № 9 in Kazan, assistant professor of hospital pediatrics department with courses of […]