e128 The authors would like to thank Emma Landers of FireKite, an Ashfield company, part of UDG Healthcare plc, for writing support during the development of this abstract, which was funded by Millennium Pharmaceuticals, Inc. Table Best response to frontline therapy (response-evaluable pts) Response, n (%) y SCT pts Non-SCT pts Btz-based therapy n1⁄4235 n1⁄4412 ‡VGPR 152 (65) 163 (40)