1. Division of Hematologic Neoplasia, Harvard Medical School, Dana-Farber Cancer Institute, Boston, MA 02215, USA
2. Myeloma Service, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
3. University of Alabama at Birmingham, Comprehensive Cancer Center, Experimental Therapeutics Program, Birmingham, AL 35294, USA
4. Pfizer, San Francisco, CA 94080, USA
5. Pfizer, New York, NY 10017, USA