FOXP3 and cancer: Summary of top 10 clusters, which contain 80% of the papers in all clusters, were suggested based on Table 2 as follows; Cluster 1 is assumed to be a group of papers on regulatory T cells, as the top keywords include “tregs” and “foxp3.” Cluster 2 includes “tumors” and “immunotherapy” in the top keywords, suggesting that it consists of papers related to cancer immunity.