A study from the Institute of General Pathology, Università Cattolica del Sacro Cuore and Fondazione Policlinico Universitario A
. Gemelli IRCCS, Rome, Italy, found that the presence of a high number of CD8+ T cells in the tumor microenvironment was associated with a better prognosis in patients with colorectal cancer \[[@B30-cancers-12-01888]\]. In addition, a study from the University of California, San Francisco