1 Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, 5-1-1 Nabeshima, Saga, 849-8501, Japan.
2 Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, 5-1-1 Nabeshima, Saga, 849-8501, Japan. kkojima@cc.saga-u.ac.jp.
3 Department of Radiology, Faculty of Medicine, Saga University, Saga, Japan.
4 Department of Pathology, Saga University Hospital, Saga, Japan.
5 Department of Pathology, School of Medicine, Kurume University, Kurume, Japan.