Text and Data Mining valid from 2018-03-14
Received: 3 October 2017
Accepted: 6 March 2018
First Online: 14 March 2018
Ethics approval and consent to participate
: The study was approved by the North West Regional Ethics Committee (reference number 10/H1014/86). All patients gave their written informed consent for participation.
: By giving written informed consent, all patients gave their approval for publication of the results of the study. There are no individually identifiable patient-level data.
: The authors declare that they have no competing interests.
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