Freund, J. E. https://orcid.org/0000-0001-9296-1148
Liem, E. I. M. L.
Savci-Heijink, C. D.
de Reijke, T. M.
Article History
Received: 12 November 2018
Accepted: 26 November 2018
First Online: 29 November 2018
Compliance with ethical standards
:
: All authors declare that they have no conflict of interest.
: The institutional review board granted a waiver for this study as no additional activities in human subjects were involved. 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.