1. Jerome Lipper Multiple Myeloma Center, Department of Medical Oncology, Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA;
2. Department of Research, PDL BioPharma, Fremont, CA;
3. Department of Biostatistics and Computational Biology, Dana-Farber Cancer Institute, Boston, MA;
4. Veterans Administration Boston Health Care System, Harvard Medical School, Boston, MA;
5. Hematology Laboratory, Institut Curie, Paris, France; and
6. Laboratoire d'Hématologie Institut de Biologie, Nantes, France