O.N. SIGITOVA1,2, A.S. KHAYRULLOV2, A.R. BOGDANOVA1, E.V. ARKHIPOV1 1Kazan State Medical University, 49 Butlerov St., Kazan, Russian Federation, 420012 2Republican Clinical Hospital of the MH of RT, 138 Orenburgskiy Trakt, Kazan, Russian Federation, 420064 Sigitova O.N, D. Med. Sc., Professor, Head of the Department of General Practice, tel. +7-917-396-24-17, e-mail: osigit@rambler.ru Khayrullov A.S, Cand. Med. […]