Footnotes

• Handling editor Ellen J Weber

• Twitter @takateru_ihara

• Collaborators Shun Iwasa.

• Contributors SA supervised patient care. TI and SA conceptualised the report. TI interpreted the data and wrote the first draft of the manuscript. SA and ON supervised the manuscript. All the authors reviewed and approved the final manuscript as submitted.

• Funding The authors have not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.

• Competing interests None declared.

• Patient and public involvement Patients and/or the public were not involved in the design, or conduct, or reporting or dissemination plans of this research.

• Provenance and peer review Not commissioned; internally peer reviewed.