CD24 and mantle cell lymphoma: Anti‐CD24 did not show any activity in CD24− cancer cell line (Figure S4C), whereas phagocytosis was restored in co‐culture conditions with all the panels of CD24+ MCL cell lines (Figure 2A,B), confirming a direct correlation between the rate of phagocytosis (expressed as delta—normalized phagocytosis, difference between anti‐CD24 and IgG1 isotype control in terms of normalized phagocytosis) and CD24 antigen surface density (Figure 2C).