Erratum

The original article [1] contained an error in Table 1 whereby the ‘Positive’ column in the ‘PD-L1’ Tumor type group of columns was mistakenly included at the beginning of the ‘PD-L2’ Tumor type group of columns.

This error has now been corrected. Furthermore, this error was not the fault of the authors, and was instead mistakenly carried forward by the production team that handled this article.

Table 1 Expression of PD-L1, PD-L2, and PD-1 in musculoskeletal tumors