Text and Data Mining valid from 2018-12-01
Received: 17 October 2017
Accepted: 27 November 2018
First Online: 24 December 2018
Ethics approval and consent to participate
: All study participants gave informed consent to participate in the study, which was approved by the National Research Ethics Services Committee South Central (reference number 11/SC/0009).
: Not applicable. Patients’ identifiers have been removed from all images and data reported in this manuscript.
: The authors declare that they have no competing interests.
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