Footnotes

• Contributors LDS contributed to the conception of the work and the acquisition of the patient’s data and drafted the work. SR contributed to the acquisition of data and revised the manuscript critically for important intellectual content. CM revised the manuscript critically for important intellectual content. SB contributed to the conception of the work and revised the manuscript critically for important intellectual content. All authors gave the final approval of the version to be published.

• 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 involved in the design, or conduct, or reporting, or dissemination plans of this research. Refer to the Methods section for further details.

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