Text and Data Mining valid from 2018-10-04
Received: 15 February 2018
Accepted: 25 September 2018
First Online: 4 October 2018
Compliance with ethical standards
: The author(s) declare that they have no competing interests.
: As per HTA licence copied to Newcastle Hospital/Newcastle University for the nstcExternalRef removed, ethical approval is institutional.
: No informed consent was required as no patient material was used and no patient was involved in this work.