Footnotes

• MB and KC are co-first authors.

• Contributors MB, KC and OAT wrote the manuscript. SH, ER reviewed and corrected the manuscript. A-SD, MT and JH reviewed the manuscript. XM reviewed, corrected the manuscript and helped for the submission.

• 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, conduct, reporting or dissemination plans of this research.

• Patient consent for publication Not required.

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