D de Totero, PL Tazzari, M Capaia, MP Montera, M Clavio, E Balleari, R Foa, M Gobbi. CD40 triggering enhances fludarabine-induced apoptosis of chronic lymphocytic leukemia B-cells through autocrine release of tumor necrosis factor-alpha and interferon-gama and tumor necrosis factor receptor-I-II upregulation. Haematologica 2003;88(2):148-158; https://doi.org/10.3324/%x.