Rituximab Combined to ACVBP (R-ACVBP) Supported by Pegfilgrastim as a New Inductive Treatment Followed by High-Dose Consolidative Autotransplantation (HDC) for Poor Risk Diffuse Large B-Cell Lymphoma (DLBCL) in First-Line. Results of LNH 03–39B. A GELA Study.