Corrigendum to "Efficacy and Safety of First-Line Immunotherapy in Combination with Chemotherapy for Patients with Extensive-Stage Small Cell Lung Cancer: A Systematic Review and Network Meta-Analysis". (26th February 2021) - Wang, Bi-Cheng; Xiao, Bo-Ya; Li, Peng-Cheng; Kuang, Bo-Hua; Chen, Wang-Bing; Li, Pin-Dong; Lin, Guo-He; Liu, Quentin