... Department of Medicine, University of Pennsylvania School of Medicine, Philadelphia, PA 19104, USA and 4Department of Biostatistics and Epidemiology, University of Pennsylvania School of Medicine; ... University of Pennsylvania School of Medicine, Philadelphia, PA 19104, USA, 2Abramson Cancer Center, University of Pennsylvania School of Medicine, Philadelphia, PA 19104, USA, 3Division of Hematology-Oncology, ... BioMed CentralOpen AccessPage 1 of 10(page number not for citation purposes)Journal of Translational MedicineResearchActivation of human B cells by the agonist CD40 antibody CP-870,893...