A.V. VIKTOROVA1, L.R. MUKHAMEDZHANOVA2,3, R.G. KUZNETSOVA4 1Institute for the advanced training of doctors of Chuvash Republic, 3 Krasnaya Ploshchad’ St., Cheboksary, Russian Federation, 428003 2Chuvash State University named after I.N. Ulyanov, 15 Moskovskiy prospect, Cheboksary, Russian Federation, 428015 3Educational-methodological center «Eksklusiv-Dent», 42 Kosmonavtov St., Kazan, Russian Federation, 420018 4Republican Clinical Hospital of the MH of […]