1. Graduate School of Frontier Sciences, Department of Computational Biology and Medical Sciences, and
2. Institute of Medical Science, The University of Tokyo, Tokyo, Japan;
3. Graduate School and Faculty of Medicine, University of the Ryukyus, Okinawa, Japan;
4. Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan; and
5. Department of Hematology, Imamura Bun-in Hospital, Kagoshima, Japan