Lähetä tietue sähköpostilla: Prognostic Significance of the Bone Marrow-to-Aorta Uptake Ratio on 2-Deoxy-2-[¹⁸F]fluoro-<span style="font-variant: small-caps">d</span>-glucose Positron Emission Tomography/Computed Tomography in Patients with Cholangiocarcinoma