Text and Data Mining valid from 2019-09-12
First Online: 12 September 2019
Compliance with Ethical Standards
: Emily Widnall, Alice Price, Hester Trompetter, Barnaby D. Dunn declare they have no conflict of interest.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
: This was a retrospective analysis of routine NHS outcome data, with the data being accessed in anonymised form. In the UK, such research does not require informed consent.
: No animal studies were carried out by the authors for this article.