Text and Data Mining valid from 2019-11-09
Received: 30 April 2019
Accepted: 30 October 2019
First Online: 9 November 2019
Compliance with ethical standards
: The authors declare that they have no conflict of interest.
: All procedures performed were in accordance and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards and ethical approval was obtained from North West Multi-centre Research Ethics Committee (REC reference: 11/NW/03820).
: Informed consent was obtained from all individual participants included in the study.