Corrigendum for “Radiofrequency ablation with four electrodes as a building block for matrix radiofrequency ablation: Ex vivo liver experiments and finite element method modelling. Influence of electric and activation mode on coagulation size and geometry” by Stefaan Mulier, Ricardo Possebon, Yansheng Jiang, Jacques Jamart, Chong Wang, Yi Miao, Tongfu Yu, Kuirong Jiang, Yuanbo Feng, Guy Marchal, Luc Michel, Yicheng Ni, published in [Surgical Oncol. 33 (2020) 145–157]