Kyverna Therapeutics Announces One-year Topline Data From KYSA-8, Its Trial Of Miv-Cel In Patients With Stiff Person Syndrome, And Topline Longer-Term Follow-up Data From Phase 2 Of KYSA-6, Its Trial In Patients With Generalized Myasthenia Gravis; Topline Durability Data Reinforce Potential For Single-dose Miv-Cel To Free Patients From Lifelong Disease Burden And Chronic Immunotherapies, Further Highlighting Miv-Cel’s Differentiated Construct