Ekhart, Corine http://orcid.org/0000-0002-2252-0467
van Hunsel, Florence http://orcid.org/0000-0001-8965-3224
Scholl, Joep http://orcid.org/0000-0002-9222-5965
de Vries, Sieta http://orcid.org/0000-0001-6090-2434
van Puijenbroek, Eugene http://orcid.org/0000-0002-2236-1398
Article History
First Online: 26 February 2018
Compliance with Ethical Standards
:
: No sources of funding were used to assist in the preparation of this study.
: Corine Ekhart, Florence van Hunsel, Joep Scholl, Sieta de Vries and Eugene van Puijenbroek declare that they have no conflicts of interest.