Combined percutaneous radiofrequency ablation and ethanol injection versus hepatic resection for 2.1-5.0 cm solitary hepatocellular carcinoma: a retrospective comparative multicentre study. - Chen, Shuling; Peng, Zhenwei; Lin, Manxia; Chen, Zebin; Hu, Wenjie; Xie, Xiaoyan; Liu, LongZhong; Qian, Guojun; Peng, Baogang; Li, Bin; Kuang, Ming (European Radiology, 2018)