Text and Data Mining valid from 2019-04-17
Received: 8 March 2019
Accepted: 19 March 2019
First Online: 17 April 2019
Ethics approval and consent to participate
: The original study was approved by the Newcastle and North Tyneside Research Ethics Committee (15/NE/0120), and by the R&D Committee of the Newcastle upon Tyne Hospitals NHS Foundation Trust (reference no. 7495).
: Consent was obtained for the original study.
: The authors declare that they have no competing interests.
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