TY JOUR TI SYSTEMIC AND DENTAL PATHOLOGY OF A PATIENT WITH RHEUMATOID ARTHRITIS ON THE BACKGROUND OF METOTREXATE THERAPY (CLINICAL CASE) KW oral mucosa KW ulcerative necrotizing gingivostomatitis KW rheumatoid arthritis KW methotrexate KW combined pathology JO Actual problems in dentistry AU Anisimova, I.V. AU Simonyan, L.A. AU Balchytis, V.V. PY 2021 IS 17 PB TIRAZH Publishing House