1. Department of Hematology, National Hospital Organization Iwakuni Clinical Center , Iwakuni, Japan
2. Department of Hematology, Oncology and Respiratory Medicine, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences , Okayama, Japan
3. Department of Nephrology, National Hospital Organization Iwakuni Clinical Center , Iwakuni, Japan
4. Department of Pathology, National Hospital Organization Iwakuni Clinical Center , Iwakuni, Japan
5. Department of Respiratory Medicine, National Hospital Organization Iwakuni Clinical Center , Iwakuni, Japan