1. Department of Hematology, Kawasaki Medical School, Japan
2. Department of Transfusion Medicine, Saitama Medical Center, Saitama Medical University, Japan
3. Department of Pathology, The Cancer Institute, Japanese Foundation for Cancer Research, Japan
4. Department of Rheumatology/Orthopedic Surgery, East Medical Center, Tokyo Women's Medical University, Japan
5. Department of Pathology, Kawasaki Medical School, Japan