Received: 16 July 2020
Accepted: 12 November 2021
First Online: 28 December 2021
: Access and permission for use of medical records were obtained from the Clinical Governance and Audit Department at Northampton General Hospital. No ethics approval was required as study was conducted retrospectively as part of an audit and service evaluation project and does not constitute research as per the Medical Research Council UK.
: Not applicable.
: The authors declare that they have no competing interests.