The influx rate of effector CD8 + T cells from the blood to tumor is defined by \documentclass[12pt]{minimal}\usepackage{amsmath}\usepackage{wasysym}\usepackage{amsfonts}\usepackage{amssymb}\usepackage{amsbsy}\usepackage{mathrsfs}\usepackage{upgreek}\setlength{\oddsidemargin}{-69pt}\begin{document}$a_{23}\cdot \frac {T_{E2}\text {Vol}_{b}}{\text {Vol}_{t}}$\end{document}a23·TE2VolbVolt. Here, CD8A is linked to neoplasm.