1. Department of Blood Coagulation Ogikubo Hospital Tokyo Japan
2. Department of Laboratory Medicine Tokyo Medical University Hospital Tokyo Japan
3. Department of Hematology Hyogo Medical University Hospital Hyogo Japan
4. Department of Pediatrics and Child Health Kurume University School of Medicine Fukuoka Japan
5. Department of Pediatrics University of Occupational and Environmental Health Fukuoka Japan
6. Department of Laboratory Sciences, School of Health Sciences, College of Medicine, Pharmaceutical and Health Sciences Kanazawa University Kanazawa Japan
7. Center for Translational Research, The Institute of Medical Science Hospital The University of Tokyo Tokyo Japan
8. Department of Infectious Diseases, Department of Haemophilia National Hospital Organization Osaka National Hospital Osaka Japan
9. Department of Haemophilia National Hospital Organization Osaka National Hospital Osaka Japan