Verwey, Willem B.
Dronkers, Wouter J.
Article History
Received: 6 March 2017
Accepted: 18 December 2017
First Online: 3 January 2018
Compliance with ethical standards
:
: Author W. B. Verwey declares that he has no conflict of interest. Author W. J. Dronkers declares that he has no conflict of interest.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
: Informed consent was obtained from all individual participants included in the study.