Text and Data Mining valid from 2020-02-07
Received: 28 September 2019
Accepted: 29 November 2019
First Online: 7 February 2020
Ethics approval and consent to participate
: All participants received the participants’ information sheet and submitted consent forms prior to the examination. This study has been approved by the National Research Ethics Services (NRES) Committee North West-Liverpool Central.
: The authors declare that they have no competing interests.