Vlieland, Nicolaas D.
van den Bemt, Bart J. F.
Bekker, Charlotte L.
Bouvy, Marcel L.
Egberts, Toine C. G.
Gardarsdottir, Helga
Article History
First Online: 8 February 2018
Compliance with Ethical Standards
:
: No sources of funding were used to assist in the conduct of this study or the preparation of this article.
: Nicolaas Vlieland, Bart van den Bemt, Charlotte Bekker, Antoine Egberts, Marcel Bouvy and Helga Gardarsdottir have no conflicts of interest directly relevant to the content of this study.