Article History
First Online: 8 October 2018
Compliance with Ethical Standards
:
: No sources of funding were used to assist in the preparation of this article.
: Ingrid Barelds, Anke van den Broek, and Bionka Huisstede have no conflicts of interest that are directly relevant to the contents of this article.
: The datasets generated during and/or analyzed during the current study are available from the corresponding author on reasonable request.