In the lung tissue of mice with pulmonary fibrosis, we found a significant decrease in the number of endothelial progenitor cells (CD45−CD31+CD34+), VEGF2+ cells (CD309+CD45−), and hemangiogenesis precursors (CD45−CD117+CD309+) (Figure 3). The gene discussed is PTPRC; the disease is pulmonary fibrosis.