Funding for this research was provided by:
Fonds Wetenschappelijk Onderzoek (11Q9516N)
Article History
First Online: 31 March 2018
Compliance with ethical standards
:
: All authors declare that he/she 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 (written) was obtained from all individual participants included in the study.