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Article History

Received: 16 September 2021

Accepted: 14 December 2021

First Online: 24 January 2022

Declarations

:

: The authors declare no conflict of interest

: The study, performed in accordance to the Declaration of Helsinki principles, is a retrospective analysis. The data used were anonymised; the study did not require patient or public involvement nor affected patient care. The study fell under the category of research through the use of anonymised data of existing databases which, based on the Health Research Authority criteria, does not require proportional or full ethics review and approval.