Text and Data Mining valid from 2018-10-20
First Online: 20 October 2018
Compliance with Ethical Standards
: No external sources of funding were used to assist in the preparation of this article.
: Jozo Grgic, Luke C. Mcllvenna, Jackson J. Fyfe, Filip Sabol, David J. Bishop, Brad J. Schoenfeld, and Zeljko Pedisic have no conflicts of interest that are directly relevant to the contents of this review.