A.F. YAKUPOVAY, B.Sh. BIKBOV, R.F. KHAMITOV Kazan State Medical University, 49 Butlerov Str., Kazan, Russian Federation, 420012   Yakupova A.F. — Cand. Med. Sc., Assistant Lecturer of the Department of internal Diseases No. 2, tel. +7-917-394-99-62, e-mail: alfiaf@yandex.ru Bikbov B.Sh. — 6th year student of the Pediatric Faculty, tel. +7-953-495-99-63, e-mail: bulat1994bikbov@gmail.com Khamitov R.F. — D. […]