The impact of chemotherapy on \documentclass[12pt]{minimal}\usepackage{amsmath}\usepackage{wasysym}\usepackage{amsfonts}\usepackage{amssymb}\usepackage{amsbsy}\usepackage{mathrsfs}\usepackage{upgreek}\setlength{\oddsidemargin}{-69pt}\begin{document}$${P16}^{INK4a}$$\end{document}P16INK4a expression has been confirmed in an independent, cross-sectional cohort of long-term breast cancer [108]. This evidence concerns the gene CDKN2A and breast cancer.