TY JOUR TI MODERN ASPECTS OF THE PATHOGENESIS OF LICHEN PLANUS OF THE ORAL MUCOSA KW lichen planus KW oral mucosa KW zinc KW copper KW iron KW magnesium KW pathogenesis KW blood-tissue barriers KW permeability JO Actual problems in dentistry AU Akmalova, G.M. AU Chuykin, S.V. AU Chernyshova, N.D. AU Bikmurzin, V.P. PY 2021 IS 17 PB TIRAZH Publishing House