Corrigendum: Real-World Lenvatinib Versus Sorafenib in Patients With Advanced Hepatocellular Carcinoma: A Propensity Score Matching Analysis - Kuo, Yuan-Hung; Lu, Sheng-Nan; Chen, Yen-Yang; Kee, Kwong-Ming; Yen, Yi-Hao; Hung, Chao-Hung; Hu, Tsung-Hui; Chen, Chien-Hung; Wang, Jing-Houng (Frontiers in Oncology, 2021)