ZZ: Conceptualization, Methodology, Data curation, Formal analysis, Writing—original draft. MP: Methodology, Resources, Writing—review & editing. AK: Data curation, Resources. AN: Methodology, Resources, Writing—review & editing. VS: Conceptualization, Methodology, Formal analysis, Writing—review & editing, Supervision. All authors take responsibility for all aspects of the reliability and freedom from bias of the data presented and their discussed interpretation.
Conflicts of interest
The authors declare that they have no conflicts of interest.
Ethical approval
This study was approved by the local audit committee and conducted as a local service improvement project (approval number 2040, Sandwell General Hospital, West Bromwich). This study adhered to the principles of the Declaration of Helsinki and Strengthening the Reporting of Observational Studies in Epidemiology (STROBE) statement: guidelines for reporting observational studies.
Consent to participate
Consent from participants is waived as the project is a retrospective study undertaken as an audit with local governance.
Consent to publication
Not applicable.
Availability of data and materials
The data that support the findings of this study are available from the corresponding author upon reasonable request.
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