THE SIGNIFICANCE OF POLYMORPHISMS OF GENE COAGULATION FACTORS VII AND XIII IN THE PATHOGENESIS OF NON-TRAUMATIC AVASCULAR NECROSIS OF THE FEMORAL HEAD ArticlePanin M.A., Zagorodnii N.V., Boiko A.V., Samokhodskaya L.M., Abakirov M.D., Volkov E.E.Genij Ortopedii. Vol. 27. 2021. P.. 43-47