TY JOUR TI TRENDS IN THE DEVELOPMENT OF THE MEDICAL SERVICES MARKET IN RUSSIA KW healthcare system KW medical organizations KW non-governmental healthcare sector KW private healthcare KW medical services market KW outpatient clinics KW hospital organizations KW regional differentiation of the medical services market JO Actual directions of scientific researches of the XXI century: theory and practice AU Krest'yaninova, O.G. PY 2026 IS 14 PB FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov