Statement of ethics committee approval
As an analysis using clinically collected, non-identifiable data, this
work does not fall under the remit of National Health Service Research
Ethics Committees. This study was approved by our institution’s
Research, Quality Improvement and Audit Department with reference
FXP-48. This statement is also present in the methods section of our
manuscript. It was not appropriate or possible to involve patients or
the public in the design, or conduct, or reporting, or dissemination
plans of our research.