Thanks are due to Yayoi Ishida of the Health Sciences University of Hokkaido for assistance with this study and Editage (www.editage.com) for the English language editing.
Author contributions
MI: Conceptualization, Investigation, Writing—original draft, Writing—review & editing, Funding acquisition, Project administration, Supervision. KO: Data curation, Software. SN: Investigation, Data curation. MY and HS: Investigation. TS and NS: Writing—original draft, Validation. NT: Writing—review & editing, Validation. AI: Writing—review & editing, Funding acquisition, Project administration. All authors read and approved the submitted version.
Conflicts of interest
The authors declare that they have no conflicts of interest.
Ethical approval
Not applicable.
Consent to participate
Not applicable.
Consent to publication
Not applicable.
Availability of data and materials
Not applicable.
Funding
This study was funded in part by a research grant (to Prof. Akitada Ichinose) for the Japanese Nationwide Survey on Autoimmune Coagulation Factor Deficiencies from the Japanese Ministry of Health, Labor and Welfare [21FC1008]. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript. The funder managed this study and helped write and revise this paper.
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