Radiofrequency ablation versus liver resection and liver transplantation for small combined hepatocellular-cholangiocarcinoma stratified by tumor size - Peng, Shuai; Dong, Song-Chen; Bai, Dou-Sheng; Zhang, Chi; Jin, Sheng-Jie; Jiang, Guo-Qing (Langenbeck's Archives of Surgery, 2023)