Yan et al. (2021) introduced a novel feature selection model considering a machine learning (ML) approach, i.e., K-nearest neighbor (KNN) and a wrapper feature selection algorithm FS_SSA based on Salp swarm, on five datasets, i.e., ALL-AML-4, Colon Cancer, Lymphoma, MLL, SRBCT datasets. This evidence concerns the gene KMT2A and lymphoma.