1. Department of Molecular Patho‐Biochemistry and Patho‐Biology Yamagata University School of Medicine Yamagata Japan
2. Japanese Collaborative Research Group on Autoimmune Coagulation Factor Deficiency supported by the Japanese Ministry of Health Labor and Welfare Yamagata Japan
3. Department of Public Health and Hygiene Yamagata University School of Medicine Yamagata Japan
4. Division of Hematology and Oncology Department of Medicine Kyoto Prefectural University of Medicine Kyoto Kyoto Japan
5. Department of Hematology Tohoku University Hospital Japan
6. Department of Clinical Laboratory Toyama Prefectural Central Hospital Toyama Japan
7. Department of Hematology Gunma University Graduate School of Medicine Maebashi Japan