Text and Data Mining valid from 2018-10-08
First Online: 8 October 2018
Compliance with Ethical Standards
: Jozo Grgic, Pavle Mikulic, Brad J. Schoenfeld, David J. Bishop, and Zeljko Pedisic declare that they have no conflicts of interest relevant to the content of this review.
: No sources of funding were used to assist in the preparation of this article.