1. Tenri Institute of Medical Research, Tenri Hospital, Tenri, Japan,
2. Department of Hematology, Tenri Hospital, Tenri, Japan,
3. Department of Diagnostic Pathology, Tenri Hospital, Tenri, Japan,
4. Department of Hematology, Shinko Hospital, Tenri, Japan,
5. Department of Diagnostic Pathology, Graduate School of Medicine, Kyoto University, Tenri, Japan