- Human T-cell leukemia virus type 2 induces survival and proliferation of CD34(+) TF-1 cells through activation of STAT1 and STAT5 by secretion of interferon-gamma and granulocyte macrophage-colony-stimulating factor. Bovolenta, C., Pilotti, E., Mauri, M., Turci, M., Ciancianaini, P., Fisicaro, P., Bertazzoni, U., Poli, G., Casoli, C. Blood (2002)