[1] Beth Israel Deaconess Med Ctr, Dept Med, Boston, MA 02215 USA
[2] Harvard Univ, Sch Med, Jerome Lipper Multiple Myeloma Ctr, Dept Med Oncol,Dana Farber Canc Inst, Boston, MA USA
[3] Harvard Univ, Sch Med, Dept Pediat Oncol, Dana Farber Canc Inst, Boston, MA USA
[4] Novartis Pharma AG, Basel, Switzerland