Text and Data Mining valid from 2019-06-12
First Online: 12 June 2019
Compliance with Ethical Standards
: No sources of funding were used to assist in the preparation of this article.
: Olivia E. Knowles, Brad Aisbett, Luana C. Main, Eric J. Drinkwater, Liliana Orellana and Séverine Lamon have no conflicts of interest that are directly relevant to the content of this review.