Cell-free IgG-aggregates in plasma of patients with chronic lymphocytic leukemia cause chronic activation of the classical complement pathway. - Michelis, Regina; Tadmor, Tamar; Aviv, Ariel; Stemer, Galia; Majdob, Rawan; Shvidel, Lev; Shehadeh, Mona; Barhoum, Masad; Braester, Andrei (PLoS ONE, 2020)