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Correction notice This article has been corrected since it was published Online First. The department for affiliation 2 was updated to 'Cardiology Department'.
Contributors JH wrote the initial draft with guidance from MS. Subsequent revisions were by JH and MS.
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.
Patient consent for publication Not required.
Provenance and peer review Commissioned; internally peer reviewed.
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