Editorial: Community series in immunotherapy with checkpoint inhibitors for non-small cell lung cancer, colon cancer, and esophageal cancer, volume II - Li, Yueyi; Wang, Yusha; Gao, Jinsheng; Tan, Keqin; Frey, Benjamin; Gaipl, Udo S.; Shi, Hubing; Ma, Xuelei (Frontiers in Immunology, 2023)