Corrigendum: Successful treatment of a patient with multiple-line relapsed extensive-stage small-cell lung cancer receiving penpulimab combined with anlotinib: A case report - Zhang, Zibo; Li, Yujun; Dong, Yan; Li, Jia; Zhang, Bin; Zhang, Chunxia; Cui, Xiaonan (Frontiers in Oncology, 2022)