Nonablative allogeneic stem cell transplantation for chronic lymphocytic leukemia: impact of rituximab on immunomodulation and survival - Khouri, Issa F.; Lee, Ming-Sheng; Saliba, Rima M.; Andersson, Borje; Anderlini, Paolo; Couriel, Daniel; Hosing, Chitra; Giralt, Sergio; Korbling, Martin; McMannis, John; Keating, Michael J.; Champlin, Richard E. (Experimental Hematology, 2004)