1. Immunology Department, Weizmann Institute of Science, Rehovot, Israel;
2. Cancer Research Center, and
3. The Israel National Hemophilia Center, Sheba Medical Center, Tel Hashomer, Israel;
4. Department of Immunobiology and Hematology, Institute for Frontier, Medical Sciences, Kyoto University, Kyoto, Japan;
5. Japan Science and Technology Agency, Core Research for Evolutional Science and, Technology, Tokyo, Japan; and
6. Institute for Stem Cell and Regenerative Medicine, Albert Einstein College of Medicine, Bronx, NY