1. Department of Hematology Takayama Red Cross Hospital Gifu Japan
2. Inspection Department Takayama Red Cross Hospital Gifu Japan
3. Yamagata University School of Medicine Yamagata Japan
4. The Japanese Collaborative Research Group on Acquired Coagulopathies Supported by the Japanese Ministry of Health, Labor, and Welfare Yamagata Japan
5. Department of Hematology Kanazawa University Hospital Kanazawa Japan