SELL and neoplasm: CD8+ T cells gated on CD3+ T (Figure 7L) cells were double stained with CD44 and CD62 L. CD44, whose isoforms are widely and asymmetrically expressed in breast carcinoma and correlated with tumor subtypes and cancer stem cell markers, has a similar role in other types of cancer (Ponta et al., 2003; Zöller, 2011; Chen et al., 2018).