V.Kh. FAZYLOV, S.V. TKACHEVA, E.R. MANAPOVA Kazan State Medical University, 49 Butlerov St., Kazan, Russian Federation, 420012  Fazylov V.Kh. — D. Med. Sc., Professor, Head of The Department of Infectious Diseases, tel.: (843) 267-80-72, 8-917-254-89-97, e-mail: vildan47@rambler.ru Tkacheva S.V. — Cand. Med. Sc., Associate Professor of the Department of Infectious Diseases, tel. (843) 267-80-99, e-mail: tkacheva-kgmu@mail.ru Manapova E.R. — Cand. […]