Text and Data Mining valid from 2019-08-22
Received: 12 February 2019
Accepted: 12 August 2019
First Online: 22 August 2019
Ethics approval and consent to participate
: The study was approved by the NHS National Research Ethics Service after proportionate review on 24th October 2013 - REC 13/SW/0293. This review agreed that patient consent was not required.
: Not applicable.
: The authors declare that they have no competing interests.