Erratum: Ofatumumab, a novel CD20 monoclonal antibody, is active in patients with fludarabine- and alemtuzumab-refractory or bulky fludarabine-refractory chronic lymphocytic leukemia irrespective of prior rituximab (Clinical lymphoma & Myeloma (2009) 9: 6 (E36) DOI: 10.3816/CLM.2009.n.098)