A.A. KAMALOVA1, 2, R.F. RAKHMAEVA1, 2, A.A. AKHAMADULLINA1, E.M. AKHAMADULLINA2, 3  1Kazan State Medical University, Kazan 2Children’s Republican Clinical Hospital, Kazan 3Kazan State Medical Academy — Branch Campus of Russian Medical Academy of Continuous Professional Education, Kazan   Contact details: Kamalova A.A. — MD, Professor of the Department of Hospital Pediatrics Address: 36 Butlerov St., Kazan, Russian Federation, 420012, tel.: +7 (843) 236-06-52, e-mail: aelitakamalova@gmail.com […]