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Contributors RH, MD: Writing original draft preparation, methodology, software. MB, MD, PhD: Conceptualisation, writing—review and editing. AB, MD: Resources, editing. EAA, MD, MSc: Resources, editing, software. MD, MD: Resources, editing. RC, MD, PhD: Resources, editing, supervision. SC, MD, PhD: Conceptualisation, supervision.
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.