Text and Data Mining valid from 2019-01-08
Received: 16 November 2018
Accepted: 26 December 2018
First Online: 8 January 2019
Ethics approval and consent to participate
: The study was approved by the Black Country Research Ethics Committee (REC reference: 10/H1202/58). All patients gave written informed consent to participate prior to entry into the study.
: Not applicable.
: The authors declare that they have no competing interests.
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