This is a randomized, open-label, active-control, parallel-group, multicenter, multinational Phase 2 Study of the efficacy and safety of VELCADE, Rituximab, Cyclophosphamide, Doxorubicin, and Prednisone (VR-CAP) or Rituximab, Cyclophosphamide, Doxorubicin, Vincristine, and Prednisone (R-CHOP) in Patients With Newly Diagnosed Non-Germinal Center B-Cell (non-GCB) Subtype of Diffuse Large B-Cell Lymphoma (DLBCL)