Text and Data Mining valid from 2019-12-01
Received: 30 May 2019
Accepted: 31 October 2019
First Online: 3 December 2019
: According to National Research Ethics Service (NRES) standards, ethics approval was not necessary due to the retrospective, observational nature of the study. Secondary analysis was performed on fully anonymised data collected for the purposes of departmental audit and service evaluation.
: Not applicable.
: The authors declare that they have no competing interests.