1 Department of Transfusion Medicine and Cell Therapy, Chiba University Hospital, Chiba, Japan. Electronic address: naoyamimura@chiba-u.jp.
2 Jerome Lipper Multiple Myeloma Center, Department of Medical Oncology, Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA, USA.
3 Jerome Lipper Multiple Myeloma Center, Department of Medical Oncology, Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA, USA. Electronic address: kenneth_anderson@dfci.harvard.edu.