Elevated serum free light chains do not predict outcome of elderly patients with aggressive CD20+ B‐cell lymphomas. (27th June 2014) - Achenbach, Marina; Bittenbring, Joerg Thomas; Ziepert, Marita; Regitz, Evi; Ott, German; Rosenwald, Andreas; Pfreundschuh, Michael; Altmann, Bettina; Held, Gerhard