1. Department of Hematology, Rheumatology and Infectious Diseases, Kumamoto University Hospital, Kumamoto, Japan,
2. Department of Diagnostic Radiology, Kumamoto University Hospital, Kumamoto, Japan,
3. Department of Pathology, Kumamoto University Hospital, Kumamoto, Japan,
4. Department of Pathology and Laboratory Medicine, Graduate School of Medicine, Nagoya University, Nagoya, Japan