Corrigendum: Association of preoperative NANOG-positive circulating tumor cell levels with recurrence of hepatocellular carcinoma - Lei, Yongrong; Wang, Xishu; Sun, Heng; Fu, Yuna; Tian, Yichen; Yang, Ludi; Wang, Jianhua; Xia, Feng (Frontiers in Oncology, 2024)