1. Department of Molecular Patho‐Biochemistry and Patho‐Biology Yamagata University School of Medicine Yamagata Japan
2. The Japanese Collaborative Research Group (JCRG) on Autoimmune Acquired Coagulation Factor Deficiencies supported by the Japanese Ministry of Health, Labor and Welfare (MHLW) Yamagata Japan
3. Department of Public Health and Hygiene Yamagata University Graduate School of Medical Science Yamagata Japan