Affiliation: | 1. Department of Hematology and Oncology, Internal Medicine, Iwate Medical University School of Medicine, Morioka City, Japan;2. Department of Hematology, Aomori Prefectural Central Hospital, Aomori City, Japan;3. Department of Hematology, Nephrology and Rheumatology, Akita University Graduate School of Medicine, Akita City, Japan |