1. Department of Hematology; Hokkaido University Graduate School of Medicine; Sapporo Japan
2. Department of Cell Physiology; Hokkaido University Graduate School of Medicine; Sapporo Japan
3. Department of Laboratory of Pathophysiology and Therapeutics; Hokkaido University Faculty of Pharmaceutical Sciences; Sapporo Japan
4. Department of Center for Hematology and Regenerative Medicine; Department of Medicine; Karolinska University Hospital; Huddinge Sweden
5. Department of Biochemistry; Hokkaido University Graduate School of Medicine; Sapporo Japan