Text and Data Mining valid from 2019-02-06
First Online: 6 February 2019
Compliance with Ethical Standards
: Elise Sloan, Kate Hall, George J. Youssef, Richard Moulding, Helen Mildred and Petra K. Staiger declares that they have no conflict of interest.
: This article does not contain any studies with animals performed by any of the authors.
: Informed consent was obtained from all individual participants included in the study.