Authors' Affiliations: 1Leebow Institute of Myeloma Therapeutics and Jerome Lipper Multiple Myeloma Disease Center, Dana-Farber Cancer Institute; 2Department of Pathology, Brigham and Women's Hospital; 3MGH Cancer Center, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts; 4Abraxis Bioscience LLC, Los Angeles, California; 5Keryx Biopharmaceuticals, Inc., New York, New York; and 6Cellworks Group, Inc., Saratoga, California (At 2010-04-01)