Steroid-Refractory Chronic Graft-Versus-Host Disease-Associated Isolated Myositis Successfully Treated With Ruxolitinib: A Case Report. - Kumamoto T; Yoshihara K; Matsuda I; Urase A; Ikunari R; Takahashi S; Samori M; Hirota S; Ohe C; Yoshihara S (EJHaem, 2026)