Text and Data Mining valid from 2019-04-01
Received: 15 December 2018
Accepted: 7 March 2019
First Online: 1 April 2019
Ethics approval and consent to participate
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. Approval Belgian Ethical Committee: 01/03/2018 - MP003022.This article does not contain any studies with animals performed by any of the authors.
: Not applicable
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.