Iodine-125 seed implantation for residual hepatocellular carcinoma or cholangiocellular carcinoma in challenging locations after transcatheter arterial chemoembolization. Initial experience and findings - Li, Jie; Zhang, Lijuan; Sun, Zongqiong; Ge, Yuxi; Xiao, Han; Xie, Qigen; Hu, Shudong (Journal of Contemporary Brachytherapy, 2020)