Hilar Cholangiocarcinoma Impact of temperature-controlled endobiliary radiofrequency ablation for inoperable hilar cholangiocarcinoma: a propensity score–matched analysis SEE THE STUDY Endoscopic radiofrequency ablation prolongs survival of patients with unresectable hilar cholangiocellular carcinoma - a case-control study SEE THE STUDY Radiofrequency ablation as a treatment for hilar cholangiocarcinoma SEE THE STUDY