BCR and chronic myelogenous leukemia, BCR-ABL1 positive: We then defined the CML progression age starting from the merge of BCR-ABL1 cells through CD34 gene expression using the following formula (refer to Methods):1\documentclass[12pt]{minimal}\usepackage{amsmath}\usepackage{wasysym}\usepackage{amsfonts}\usepackage{amssymb}\usepackage{amsbsy}\usepackage{mathrsfs}\usepackage{upgreek}\setlength{\oddsidemargin}{-69pt}\begin{document}$${T}_{{{{\rm{disease}}}}\,{{{\rm{age}}}}}=A\times [{{{\rm{CD}}}}34]+B.$$\end{document}Tdiseaseage=A×[CD34]+B.